New Year's Eve, 1940, is unusual for the Paradine family. Departing from tradition, James Paradine makes a speech that changes the course of many lives. Valuable documents have disappeared. A member of the family has taken them. The culprit has until midnight to confess and return the papers.

A few minutes after twelve James Paradine is dead. The family closes tight in on itself and the alibis semm impenetrable. And it is left to Miss Silver to unravel the mystery and to disentangle the threads that bind the Paradine family in a strange web of dislike, hatred and fear.