Brothers Zach and Gray Mitchell visit Jurassic World, a dinosaur theme park on Isla Nublar, of which their aunt Claire Dearing is the operations manager. Claire assigns her assistant Zara as the boys' guide, but they evade her and explore on their own. Elsewhere on the island, U.S. Navy veteran and ethologist Owen Grady has been training a squad of Velociraptors composed of Blue, Echo, Delta, and Charlie, and researching their intelligence. Based on the raptors' ability to follow commands, head of InGen security Vic Hoskins believes that the animals can be weaponized, an idea Owen and his assistant Barry vehemently oppose.
Prior to its opening, Claire and park owner Simon Masrani inspect the park's newest attraction, the Indominus rex, a transgenic dinosaur created by geneticist Dr. Henry Wu. Masrani tasks Owen with evaluating the enclosure's security. Owen warns Claire that the Indominus lacks social skills, making it dangerous and unpredictable. When the Indominus has apparently escaped, Owen and two park workers enter the enclosure. The Indominus, which can camouflage itself and mask its heat signature, suddenly appears. Owen survives, but it devours the other two men before escaping into the island's interior. Owen advises Masrani to have the Indominus destroyed, but to protect his company's investment, Masrani dispatches a specialized unit to subdue it with non-lethal weaponry, so it can safely be returned to its paddock. After most of the unit is slaughtered, Claire orders the evacuation of the island's northern sector.
While exploring the park in a tour vehicle, Zach and Gray enter a restricted area. The Indominus arrives and destroys the vehicle but the boys narrowly escape. They find the ruins of the original Jurassic Park visitor center, repair an old Jeep Wrangler, and drive back to the park resort. As Claire and Owen search for the boys, they barely escape the Indominus. Masrani and two troopers hunt down the Indominus by helicopter, but it breaks into the park's aviary. The aviary's pterosaurs crash Masrani's helicopter, killing all three inside, before converging onto the resort, and terrorizing many of the visitors, including Zara who is later devoured by the resident Mosasaurus. Gray and Zach find Owen and Claire at the resort as armed personnel shoot down the pterosaurs.
Assuming command, Hoskins orders the raptors to be used to track the Indominus, with or without Owen's cooperation. Owen is resigned and spearheads the assault with the raptors. Upon finding the Indominus, the dinosaurs begin communicating among themselves. Owen realizes that the Indominus has Velociraptor DNA in it and it usurps Owen's dominance, becoming the pack's new alpha. Troops fire on the Indominus, but it escapes. The raptors slaughter most of the troops, while Charlie is killed in the chaos. Hoskins evacuates Wu and the dinosaur embryos from the island to protect Wu's research. Owen, Claire, and the boys find Hoskins at the lab trying to secure more embryos, but Delta breaks in and kills him.
Owen re-establishes his bond with the three surviving raptors before the Indominus reappears. They attack the hybrid, but Delta and Echo are killed while Blue is knocked unconscious. Claire releases the veteran Tyrannosaurus rex from its paddock and lures it into a decisive battle with the Indominus, which gains the advantage over the T. rex until Blue recovers and rejoins the battle. The duo overpower the Indominus until it gets cornered at the lagoon's edge, where it is dragged underwater by the Mosasaurus. The survivors are evacuated and the island is abandoned again. Zach and Gray are reunited with their parents, while Owen and Claire decide to stay together.
Chris Pratt as Owen Grady,
Bryce Dallas Howard as Claire Dearing,
Vincent D'Onofrio as Vic Hoskins,
Ty Simpkins as Gray Mitchell
Nick Robinson as Zachary "Zach" Mitchell,
Omar Sy as Barry,
BD Wong as Dr. Henry Wu,
Irrfan Khan as Simon Masrani,
Jake Johnson as Lowery Cruthers,
Lauren Lapkus as Vivian,
Brian Tee as Hamada,
Katie McGrath as Zara,
Judy Greer as Karen Mitchell,
Andy Buckley as Scott Mitchell,
Additionally, Jimmy Fallon and Jimmy Buffett cameo as themselves. Patrick Crowley, the film's producer, cameos as Masrani's flight instructor while Colin Trevorrow briefly provides the voice of Mr. DNA, an animated DNA helix who explains the park's technology to visitors. Brad Bird provides a voice cameo as the park's monorail announcer and Jack Horner, the film's technical advisor, also cameos. Eric Edelstein cameos as a paddock supervisor. A photograph of Jeff Goldblum is used to represent his character Dr. Ian Malcolm on the back cover of a book.
the fourth installment of the Jurassic Park franchise and the first installment in the Jurassic World trilogy.