When newlyweds Agnes and Andrew Kinghof are present for the discovery of an over-ripe corpse in the air-raid shelter of their apartment building, the two set out to put their amateur detective skills to work. The dead man's sister is nearly frightened to death by the appearance of a grinning pig's head outside her window, and she claims to be threatened by someone calling himself 'The Pig'. The newlyweds deduce that it must be someone who lives in the same apartment building. Set during the Second World War, this deceptively light-hearted page-turner is one of two detective novels jointly-written by Pamela Hansford Johnson and her first husband and journalist, Neil Stewart, under the joint pseudonym 'Nap Lombard'.