With Burke out of town, Tim, Les and Sgt. Ames have to discover who is responsible for the murder of a blackmailer found propped among the mannequins in a department store window. Les is intrigued by the store owner's executive secretary, Tim follows the head of ladies' fashion, a race car enthusiast, and Sgt. Ames tracks down a nightclub comic who works days as a bus driver. The owner's son and a shifty sidewalk pitchman also come under suspicion. After the man who found the victim is himself killed, a winning racetrack ticket proves the final clue to the murder.
