Mrs. Peel is invited to a bridge party at a house on Exmoor but when she arrives she discovers that she has been lured there by a man known as 'The joker'. She had once helped to put him in prison, but he has now escaped and with his two crazy accomplices, subjects Mrs. Peel to a series of lethal tricks and traps until Steed arrives to help her.—don @ minifie-1