A business client of the insurance company needs Johnny to put a stop to a rash of frauds taking place in that business. It doesn’t take Johnny long to meet a lovely dame, who is the company rep who is to show him the ropes. It also doesn’t take long for the next theft to take place. Armed with fresh clues, johnny gets busy.

Mr Snyder is the harried store manager, and he tells about the shooting, and a little girl who witnessed the crime. Johnny may be a genius at his expense reports, an excellent investigator, but his child skills are in sore need of repair. Santa Claus to the rescue. With a description in hand, and with the belief the theif is still in the department store Johnny makes plans to search to building.

There’s just one little snag with the whole plan, the thief has hijacked Santa, and is proving to be hard to catch. with all the customers busily shopping, what can be done? If the store is closed, and the customers and employees leave, won’t the killer leave with them? Still, Johnny manages to set a trap. Gunshots puntuate the cat and mouse game. Johnny gets his weekly thump on the head, but when he wakes up he springs back into action with renewed vigor, and the solution to the mystery.