In Los Angeles, Alan Palmer and his wife Jane Palmer are driving to a party when a suitcase is thrown in the back seat of their car. When they open the suitcase, they find a large amount but they are chased by another car and they flee. Alan decides to deliver the money to the police, but Jane opposes and wants to keep it. So Alan decides to keep the suitcase with the money in a locker at the Union Station to decide what to do. A couple of days later, Jane spends a large amount in furs and other gifts for her. Then a man called Danny Fuller comes to their apartment and Jane believes he is a detective and let him in; but soon she learns that he is also seeking the money. When Alan returns from his work and finds the shopping, he becomes upset and Jane does not tell anything about Danny. During the night, Alan and Jane go to a boat ride to make amends and she accidentally kills him with his pistol. Danny is forced to help her to dump the body in a lake and Jane reports to the police that her husband is missing. Her sister-in-law Kathy Palmer that lives in the same floor snoops around Jane's apartment and finds the receipt of the locker. When she is sneaking out, she stumbles with the stranger Don Blake that tells that is Alan's friend. Meanwhile Jane is seeking the receipt to get the money for her. Why the money was thrown to the backseat of the Palmer's convertible? Who will keep the money? Who are Danny and Don Blake?