The player takes control of former Navy Seal Craig Dylan as he accompanies his war buddy Amando "Rock" Depiedra, and scientist Sabrina Sayrus to the Bermuda Triangle searching for Sabrina's father, Dr. James Sayrus. The trio are forced to jump out of the plane after a vortex interferes with the plane. Each jumps through a different vortex, landing in a different place in the Bermuda Triangle.
Dylan is forced to trek across the island, passing a beached cargo ship and volcano, and encountering several dinosaurs and items from various time periods, before discovering a fort that has been maintained by the missing Dr. Sayrus, Sabrina's father, as well as Rock, who was marooned on the island years before Dylan and is now past his prime. Dr. Sayrus warns Dylan of an impending disaster and instructs him to find a Temporal Vortex Engine (TVE) that will allow them to return to their own time, located in a German submarine in a cave.
Dylan finds the TVE and while returning to the fort, meets up with Sabrina again, who is being chased by a massive Spinosaurus, nicknamed "Spike." A Tyrannosaurus arrives and fights Spike but is easily overpowered and killed when Spike snaps its neck.
Dylan and Sabrina manage to escape and return to the fort, only to learn that the uranium battery that powers the TVE no longer works. Dylan manages to recover another battery from a drone that apparently arrived on the island via a temporal vortex from the future and returns to the fort, but the Spike attacks again. Dylan fends him off while Dr. Sayrus repairs the TVE, allowing Dylan and Sabrina to escape while he and Rock remain to fight off Spike.