萨姆·斯佩德(亨弗莱·鲍嘉 Humphrey Bogart 饰)和搭档阿切尔在旧金山市开了一家侦探事务所。一天,一位贵妇(玛丽·阿斯特 Mary Astor 饰)登门拜访,委托他们寻找自己失踪的妹妹。
An engineer trapped in an unhappy marriage murders his wife in the hope of marrying her younger sist