In Victorian London race-walking or “wobbles” are all the rage. So on a Monday morning in November 1879 the crowds gather for Islington's bizarre six-day endurance walking race. By Tuesday one of the contestants is dead. Tetanus from a blister is assumed but then there is a second death and this time it's definitely murder. A bemused Sergeant Cribb from Scotland Yard is called in along with Constable Thackeray and they soon discover that something foul is at play.

Part of the Sergeant Cribb Series series.