Interested in making a big score, he gathers his old mob together and bullies them into knocking off dangerous mobster Rocky Stansyck’s (Thomas Brown Henry) gambling joint. Rocky has a reputation of getting even with anyone who crosses him which deters Marcy, Rosie and Big Boy, but the smart-alecky Muller convinces them his heist plan is fool-proof and there’s $200, 000 in the take. The robbery gets botched and only Marcy and Muller escape alive with the $60,000 they split. A frightened Marcy gets knocked off by the mobster in Mexico, while Muller remains at home in LA. Muller soon discovers a psychiatrist, Dr. Victor Bartok, is a dead-ringer for him except for a scar on his cheek. When he further discovers that Bartok’s secretary Evelyn Nash (Joan Bennett) is having an affair with the shrink, he moves in and romances her. He uses Evelyn to get into the office files and get the shrink’s signature, and then takes a job as a parking lot attendant where Bartok parks. Muller gives himself a scar on the cheek with a scalpel, but gets the wrong cheek due to the photographer’s enlargement being “reversed” in the negative. When he kills Bartok, he realizes the scar is on the wrong side but nevertheless takes the shrink’s place. No one notices, and Muller not only fools Evelyn but his brother who comes to tell him that Rocky is no longer after him–he was deported for income tax fraud.