“Zero Hour” is the moment of crime that everything is building towards. At Lady Tressilian's late summer, a strange company gathers: the famous tennis player Nevile Strange, his current and former wife, and a pair of men with whom the two women have unresolved love affairs. The tension in the seaside mansion culminates in the murder of the hostess. A difficult case awaits Superintendent Battle, who happens to be in a nearby town. It looks like no one had a reason to kill her. However, the whole story began long before the murder...