This gripping, gritty film noir begins as a mortally wounded physician staggers into the apartment of a vicious vixen, the leader of a notorious gang of thieves. Shots ring out, and the police rush to the scene. Sergeant Leonard gets there to find the doctor dead, and the woman failing fast. As she lay gasping she decides to tell the sergeant the whole terrible story that began when she got involved with a cop-killing robber who was captured and sentenced to death. Before his fateful date with the gas chamber, he lets the rest of the gang know where he hid the $40,0000 they netted from the caper; he, with her help, also arranges to ingest the doctor's newly developed drug, an antidote to cyanide, to escape his "execution." The plot works, and eventually, the gangster is back in business. He gives his girl half of the map, but unfortunately gets shot by a rival before he can give her the other half. The ruthless woman and another gang member then force the doctor to assist them with their search. They are heading off to the location, when the double-crossing she-devil kills the other gangster in a horrible manner and continues on with the doctor. They find the chest containing the loot and they get an awful surprise. The woman begins laughing hysterically as if on the verge of a full-blown break down. She shoots the doctor and then flees, thereby bringing the story up to the present. Just before she dies, the ruthless woman reveals the astonishing contents of the chest.