Eden vodilnih svetovnih paleontologov, dr. Alan Grant, ki se je pred osmimi leti prvič srečal z dinozavri, ima velike finančne težave. Ob pravem času dobi ponudbo premožnega Paula Kirbyja in njegove bivše žene Amande. Če ju bo spremljal na zračnem ogledu otoka, kjer dinozavri živijo na svobodi, bosta denarno podprla njegove raziskave. Alanu ne preostane drugega, kot da sprejme radodarno ponudbo. Vendar Alan šele čez čas spozna, zakaj sta ga Paul in Amanda sploh povabila na potovanje.
Dr. Alan Grant is now a happy man with the previous incidents of Jurassic Park now behind him. Grant is that happy that he announce in public, that nothing on Earth can persuade him back onto the islands. Maybe nothing, except Paul Kirby. Kirby and his wife, Amanda want a plane to fly them over Isla Sorna, with Dr. Grant as their guide. But not everything Kirby says is true. When the plane lands, Dr. Grant realizes that there is another reason why they are there, that he doesn't know of. Now, Dr. Grant is stuck on an island he has never been on before, with what was a plane journey now turned into a search party.