A young woman turns to Holmes for protection when she's menaced by an escaped killer seeking missing treasure. However, when the woman is kidnapped, Holmes and Watson must penetrate the city's criminal underworld to find her.

The mirthful adventures of Police-Sergeant Samuel Dudfoot and his two constables, Albert Brown and Jeremias Harbottle, who stage a fabricated crime-wave to save their jobs---and then find themselves involved in the real thing.