The thunder rolls over the desert in New Mexico, and Sam Beckett leaps into a man named Philip Payne, a doctor involved in the search for a plane that went down in the wilds of British Columbia.

The lighting flashes - and Project Observer Al Calavicci also leaps, into a passenger on the plane. Now Sam must race against time and the forces of nature for the sake of a father and daughter at bitter odds - and for the life of his friend.