Here, at least, is the germ of an idea. Through some warp of time, a father and his grown-up son communicate through ham radio, though 30 years apart. Dad (Dennis Quaid) is a fireman who died in a fire the day after their 1969-1999 conversation. Son, a cop (Jim Caviezel) knows how he could have survived. This leads to an edge-of-seat fire sequence and the past is changed: colleagues tell Caviezel his father died of lung cancer in 1989: even the photos in his flat change. You wonder eagerly where the film might go with all this. The answer, alas, is not very far. Being a thriller, it gets involved with the story of a serial killer, one of whose victims was Quaid's wife, who wouldn't have been home if he'd burned to death. It gets sillier, finally falling apart with events at the end which Caviezel must have witnessed as a kid but doesn't seem to know about.