On the evening of his decoration for bringing a murderer to justice, Washington DC Police Captain Frank Matthews' wife, and her lover are murdered in bed. Jailed as the prime suspect, with the aforementioned murderer released on a technicality Matthews escapes in search of the man he believes to be the real killer.

Astronomers discover a comet that they believe will crash into Phoenix, Arizona. They attempt to warn officials, but without 100% certainty, the governor of Arizona is reticent to cause a panic. Even after a television news reporter discovers the truth and threatens to go live with it, the response is understated enough to doom some residents of Phoenix to certain death.

A free-spirited young woman, Breezy, hitches a ride with an aging real estate salesman, Frank. Sensing that she just wants to use him he tries to have nothing to do with her. She's not that easy to shake, however, and over time a bond forms between them.