The two young brothers Zach and Gray visit their aunt Claire, who also happens to be a manager at Jurassic World, which is a big and comprehensive dinosaur theme park located off the coast of Costa Rica. However, Claire is too busy climbing the corporate ladder and is initially very busy to be with the kids so she gives them an introduction to the place and tells her assistant Zara to be with them. Simon Masrani, the park's owner arrives and together, they go to special enclosure to make Claire see the Indominus Rex, a new hybrid dinosaur that has been made by genetic modification. They have used a Tyrannosaurus Rex and spliced genes from Velociraptors and other kinds of dinosaurs with it. The immediate impression is that they don't really know the temperament of this new beast that they have created. Masrani tells Claire that she should bring Owen over, as Owen is an expert on dinosaurs.
Owen, who is feeding his velociraptors and teaching them to obey orders is met by Vic Hoskins, who is the head of InGen security. Hoskins tries to impress on Owen the importance of using the raptors as weapons, but Owen will have none of that. Later, Owen rescues a new staff member from being eaten alive by the raptors, when he falls into their pit. The way the raptors behave proves that the animals are very much in line with their instinct and not like house puppies. After Claire meets Owen, she takes him to the Indominus Rex enclosure purportedly to show him the new dinosaur. But a thermoscan check (they have a sensor attached on the animal) reveals nothing, leading them to believe that the Indominus has jumped the wall and escaped. Owen and two others enter the enclosure to examine the claw marks that the creature made on the wall but it turns out that the creature is still in the enclosure. Claire, who was monitoring things, warns Owen and the other two to exit immediately. But the Indominus appears and attacks them, killing one of the staff. Owen and the other staff member escape the containment door just as it's closing but the Indominus crashes through it. The other staff member is killed when the Indominus sniffs out that individual. Owen escaped being scented out by dousing himself in petrol from under the car he is hiding in.