Sammy Guitierrez is described as having a loud and gregarious personality type. Her friendly demeanor causes her to attempt to befriend her co-campers during their stay on the Island. Sammy’s was chosen as one of the six one of the six campers attending the inaugural week of Camp Cretaceous at Jurassic World on Isla Nublar.
Sammy’s family owns a ranch that supplies the meat for the carnivores of Jurassic World. At an undisclosed time in the past , Sammy’s family’s ranch borrowed money from fronts for Mantah Corp. Afraid that her family would lose the ranch, she offered to act as a spy for the company after being accepted into Camp Cretaceous, and sneaking genetic samples from the dinosaurs for the company’s illicit use.
Sammy would arrive on Isla Nublar via the Ferry Landingalong with the other campers, and be greeted by Dave and Roxie. After initial introductions, the campers are driven to Camp Cretaceous by their co-counselors, only stopping briefly as the counselors attempt to recapture an escaped Compsognathus. Reaching the camp, they are given a brief overview of the camp rules, before they get a chance to unpack. That night, all of the campers, Sammy included, get a chance to ride a zipline over the dinosaur herd in Gyrosphere Valley.
The next day, the campers visit the Field Genetics Lab, where they are given a tour of the facilities, including a dinosaur nursery. Sammy uses this time to sneak into the office of Dr. Henry Wu, and save important information from his computer and files onto a flash drive. Attempting to sneak out, she runs into Brooklynn, and rejoins the group just before Bumpy‘s birth. However, they are shortly after evicted by Dr. Wu, as he is furious over Brooklynn’s breaking into the lab.
The group return back to the camp for the night, after picking up Darius and Kenji. That night, she is among the group listening to campfire stories, before rain forces them inside. Sammy attempts to connect with Yasmina, but Yaz chooses to walk away rather then interact with her. Later that night, a drone lands in a forest clearing, where it is greeted by Sammy who deposits the USB drive in it before it takes off again.
The next morning, the Campers are taken to Gyrosphere Valley, to help the park personnel lead the herd to their grazing pens. Yasmina is paired up with Sammy in her Gyrosphere, much to her consternation. Yaz initially continues to be resistant to Sammy’s attempts at reaching out, even as they ride together. Meanwhile, the counselors cut the activity short due to an approaching storm, and ride out to warn the other employees. Initially planning to stay put, Yasmina and Sammy end up attempting to assist the others in herding a lone Sinoceratops back to it’s enclosure.
However, the group accidentally causes the herd to stampede, and Yasmina and Sammy are separated from the others after accidentally trapping their sphere. Thinking quickly, the girls manage to create a ramp by which they are able to speed out of the enclosed area, quickly reuniting with Ben and Kenji soon after. Finding that Brooklynn and Darius are trapped in a sinkhole, the group tries to pull them out, but only succeed with the aid of the Sinoceratops. At some point before they are rescued by the counselors, Sammy takes the opportunity to steal some genetic material from the Sinoceratops.
Later that night as the group prepares to go to bed, Yasmina apologies to Sammy for her earlier behavior, and reveals her secret hobby of drawing sketches of dinosaurs in a notebook. That night, Sammy realizes that Brooklynn has captured footage of her taking a genetic sample from the Sinoceratops, and steals her phone in an attempt to hide the evidence.
The next morning, the counselors leave the children alone, as they attempt to contact Claire Dearing. As the campers settle into waiting, Brooklynn confronts the group and accuses Sammy of stealing her phone, but Yasmina steps in to defend her. The group is distracted by the sound of an approaching dinosaur, and they decide to head to the observation tower to try to determine where the roar is coming from. The campers successfully break into the tower, seemingly relieved to see the noise is only a Brachiosaurus feeding.
Just then, two employees emerge from the jungle and alert the children to come down. Initially refusing, the kids watch horrified as the Indominus Rex ambushes and kills the two men. As the hybrid attacks the tower, the group attempts to use the zip line to escape, although the emergency brake trips, leaving some of the group stranded in the center. The tower begins to rock, and Sammy nearly falls, only to be saved by Yasmina, and then pulled up by the combined efforts of Darius and Kenji as well. The Indominus succeeds in knocking down the first tower, along with the line, sending the campers, Brooklynn included, falling down to earth.
The campers awaken after being briefly disoriented, and make a run for the camp, only to find that it has been destroyed. Sammy attempts to give the phone back to Brooklynn, but hides it again, after realizing it was broken in the fall. The campers flee back to camp only to find that the camp has been destroyed in their absence by the Indominus. As Sammy tries to reassure them that the other workers got away, Sammy finds an overturned staff vehicle, and realizes not all of them survived. Brooklynn publicly confronts and accuses Sammy again in front of the group, demanding her phone back, and revealing her earlier incursions into the park security. Sammy denies it, gaining some of the other camper’s support, as the group descends into arguing among themselves, before eventually deciding to journey to the main park for help.
As the group continues onward, they become argumentative, particularly Brooklynn, who continues to accuse Sammy of stealing her phone, and Yasmina continues to defend her. They pass by the Carnotaurus Paddock, and try to reach the Visitor’s Center. As the group continues onward, Sammy wrestles with guilt over whether to tell the group about her theft of the phone. However, before she can make up her mind, the group encounters the corpse of the Ankylosaurus and the smashed Gyrosphere from when the Indominus Rex attacked Zach and Gray Mitchell. As the group hears a rustle in the jungle, they initially seek shelter, before it is revealed to be Bumpy.
The group continue walking, with the new objective to go to the Field Genetics Lab to seek shelter. The group would then find a van and decide to use it to reach the lab, but are attacked by the Indominus soon afterward. They manage to evade it using the van, eventually finding, and seeking shelter in the Field Genetics Lab. They encounter Eddie, a scientist who was left behind, but he very shortly attempts to steal their van to escape. The van is quickly totaled by the Indominus Rex, and the group is forced to hide briefly among shipping containers as they are stalked by the creature. After a tense few moments of evading the creature, the group makes it back to the van where they escape.
Yasmina stumbles while attempting to make it to the van, but is saved by Sammy, as they climb into the van. As they drive away, they begin celebrating in relief, as the van stumbles over bumpy ground, and in the commotion, the phone falls out of Sammy’s pocket in full view of the group. Everyone in the group is so stunned by this revelation, it even distracts Yasmina, to the point she crashes the car.
The group climbs out of the crashed ACU van, as the campers are recovering from their injuries. Yasmina storms off, as Sammy runs after her, pleading with her to wait. However, the group turns on Sammy for her lies. Feeling the pressure, Sammy admits that she is a spy for Mantah Corp, and relates to them the background reasons for her theft.
Sammy attempts to apologize, but the group, particularly Yas, refuses to accept her apology. Sammy runs off, while the campers regroup and attempt to determine a new course of action. They are interrupted by the Indominus as it is pursued by the helicopter piloted by Simon Masrani. The helicopter pursues the Indominus to the Aviary, as it breaks in and frees the Pteranodons. The campers watch helpless, as the Pteranodons force the helicopter to crash, causing Simon Masrani’s death, just before the pteranodons turn on them as well.
The group run from the Pteranodons, just barely managing to get to safety in the Kayak River. They decide to use the Kayaks in the attraction to navigate the river, as there are two people per kayak. The campers encounter a cave lit by bioluminescent bacteria, and a large waterfall. Brooklynn tries to deflect the blame for their situation on Sammy, however, Kenji states that their situation might have been the same regardless. Sammy admits to Darius that her parents didn’t send her to spy, but that she had chosen to do so on her own to keep them from losing everything.
The group then encounters some Parasaurolophus in the underground river, and then become agitated by Bumpy’s cries, starting to attack the Kayaks, before they abruptly flee. The group are then almost sucked into a side tunnel due to a strong current, which expels them into the Mosasaurus Lagoon. The Mosasaur begins circling them, and so the campers make for the safety of the spectator stands.
Just as the Mosasaurus is about to bear down on Sammy and Darius, Yasmina successfully diverts its attention by whacking the platform with an oar. Sammy and the others are able to utilize this distraction to make it to safety. After everyone reaches the stands, they take some time to rest on the stands as the sun sets. Sammy attempts to apologize to Yasmina, but is again rebuffed, although Brooklynn mends fences with her. Hearing the sirens warning of the evacuation of the park, the campers decide to head for the South Dock.
The group decides to head for the Monorail in order to make it to the docks in time, but are interrupted by the arrival of the Carnotaurus. The group decides to attempt to sneak past while it’s back is turned, as Darius creates a distraction to lure it away. Reaching the top of the platform, they reach the monorail as it arrives, only for the announcement system to loudly alert the Carnotaurus to their presence. The predator gives chase but has difficulty climbing up the stairs, tripping and falling halfway up. The campers make it into the safety of the platform in time, just as the Carnotaurus reaches the top. However, it’s weight is too much to support the stairs, and it crashes through to the floor below
The group celebrates as they believe their rescue and evacuation is imminent, as the Monorail continues towards the South Docks. The campers discuss what they want to do once they are rescued, and then toast to surviving the events of the day. However, after their mood is soured once they hear a distant explosion, Sammy attempts to create a toast based on making new friends, but gets a lukewarm reception, as the group is unsure if they will ever see each other again after rescue.
However, this contemplation is interrupted by the sound of something large crashing into the Monorail, and it swiftly emerges that they are under attack by Pteranodons. Sammy assists the group in helping to try to knock the lights out to prevent an attack, and later uses her flashlights to distract the attacking pteranadons to allow Ben to re-route the train to stop it from crashing. She witnesses Ben falling from the train, but is powerless to stop it along with most of the survivors. Shortly after, she along with the rest of the group, jump off the train as they land in the jungle. The group decides to utilize the maintenance tunnelsto get to the docks, as they will not make it otherwise.
. The group encounters some roadblocks, and a group of Compys, before they are ambushed by the Carnotaurus again. The group manages to evade the Carnotaurus for a short while, until they reach a sealed off portion of the tunnel which was previously the exit. They decide to open the nearby crates, and attempt to attack the Carnotaurus.
However, the animal charges the cart containing the compressed air tanks they planned to ambush it with, sending the tanks flying everywhere, and causing a fire to start. The Carnotaur proceeds to attack the group, as they narrowly evade it in the confined space. Eventually, they manage to create an explosion that severely wounds the animal. As the group stumbles out of the wreckage, they are stunned to see that the Carnotaurus has also survived, although it is heavily scarred. The animal decides to leave to heal from its injuries rather then attempt a confrontation. Just then, the campers realize that the explosion created an exit passageway, only to find that Jurassic World has been evacuated.