While outdoors recording sound effects for a movie, audio technician Jack Terri hears a tire blowout and a car crash.
Before the car sinks into the river, he manages to save the female passenger from drowning.
Because the other passenger was a presidential candidate, Jack suspects that the "accident" was a political murder.
Afterwards, Jack falls in love with Sally, the woman he rescued, and learns that she's been in cahoots with Manny, a sleazy photographer who's operating a blackmail scheme.
As part of their scam, Manny photographs Sally with important men in what appear to be compromising situations.
Jack starts to wonder whether he's being paranoid or whether things are not quite what they seem.
Then the assassin turns his attention to Jack and Sally, and Jack has to use every special effects trick in the book to keep them both alive.