When the prematurely middle-aged J.P. Huddle is recommended to take an "unrest-cure" by a friend, he little realizes that the other passenger in the railway compartment, the prank-loving Clovis, will take this as a personal challenge. The havoc which Clovis's macabre and at times shocking practical joke causes is beyond anything that the sleepy hamlet of Tilfield has seen before. Hector Hugh Munro at his most macabre.