John "Johnny" Forbes (Dick Powell) is a middle-class husband and father who is tired of his boring routine, working for the Olympic Mutual Insurance Company in downtown Los Angeles. On a day when he is especially downhearted about his life, private investigator and former policeman J.B. "Mac" MacDonald (Raymond Burr) reports to him regarding an embezzler who had been bonded by Olympic Mutual. The man, Bill Smiley (Byron Barr), is serving time for the crime, and is eligible for parole in two months. Smiley had given several expensive gifts – including a speedboat named Tempest - to his girlfriend, Santa Monica model Mona Stevens (Lizabeth Scott).
