Following the chance discovery of certain documents, a historian sets out to unravel the mystery of a murder committed in his childhood Mexico City home in the autumn of 1942. Mexico had just declared war on Germany, and its capital had recently become a colorful cauldron of the most unusual and colorful of the European ilk: German communists, Spanish republicans, Trotsky and his disciples, Balkan royalty, agents of the most varied secret services, opulent Jewish financiers,