Still grieving his young wife's death in a hit-and-run accident, Manhattan cab-driver David Marks accepts a regular evening assignment to drive a beautiful but enigmatic woman to a mansion outside New York. One night he tries to discover the truth behind his mystery fare; but in doing so finds himself wanted for a murder he didn't commit. There follows his frantic hunt to uncover the truth behind the murder: the action moves to the streets of New York as the police scour the city in pursuit. But...