The opening chapter tells of a stealth theft from an armored car that was only discovered when the money went missing after the driver and guard stopped for coffee and doughnuts. The "Cool & Lam" agency gets a visit from Detective Sergeant Sellers because their name and number was found on a piece of paper in a suspect's possession - the alleged girlfriend of a criminal found with half the loot. The police think this money was ordered by a big bookmaker. This girlfriend, Hazel Downer, visits Donald Lam to find her missing husband, and the money she inherited. Coincidentally, this money matches the amount missing in the robbery! Chapter 2 gives a quick introduction to the public relations racket and its use in merchandising. Donald Lam follows the clues he discovers. A duplicate trunk is shipped to San Francisco, and Lam follows. Lam meets Hazel and goes for a ride. Their meeting is interrupted by Sergeant Sellers. How will Donald Lam get out of this mess?