Off to an early morning meeting in Scotland Yard, Superintendent Mike Yeadings boards a commuter train and prepares for the trip. The train, however, doesn't get too far before coming to a screeching halt: there is a body on the tracks. What at first looks like a suicide is soon revealed to be a vicious crime-the victim has been garroted and his hands mutilated. His pockets are also empty which makes them wonder if robbery was the motive or if the killer was trying to hide the identity of the victim to protect himself.