In WWI East Africa, a gin-swilling Canadian riverboat captain is persuaded by a strait-laced English missionary to undertake a trip up a treacherous river and use his boat to attack a German gunship.
A psychopathic man tries to forcibly persuade a tennis star to agree to his theory that two strangers can get away with murder by submitting to his plan to kill the other's most-hated person.
A frustrated former big-city journalist now stuck working for an Albuquerque newspaper exploits a story about a man trapped in a cave to rekindle his career, but the situation quickly escalates into an out-of-control circus.