Private eye Philip Marlowe is hired by ex-con Moose Malloy to find his girlfriend, a former lounge dancer. While also investigating the murder of a client and the theft of a jade necklace, Marlowe becomes entangled with seductress Helen Grayle and discovers a web of dark secrets that are better left hidden.
An experienced arson investigator takes along his young associate as they try to find an arsonist who is burning down movie sets.
The professional gambler Case Silverthorn wants to quit and retire to a small ranch in Marlpine he bought recently. On the way there he saves the Sheriff's life, who got into an ambush. However another man is dead, Will Donovan, from whom he bought the ranch! Neither the Sheriff nor Donovan's children know about the sale. So Case has to switch back to his former profession, while he tries to clarify the situation. He comes across a group of cattle thieves.
In order to get back into the good graces with his wife with whom he has had a misunderstanding, a young chemistry professor concocts a wild story that he is an undercover FBI agent. To help him with his story he enlists the aid of a friend who is a TV writer. The wife swallows the story and the film's climax takes place in the sub-basements of the Empire State Building. The professor and his friend, believing themselves prisoners on an enemy submarine, patriotically try to scuttle the vessel and succeed only in rocking the building.