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After a dinner-party to celebrate the engagement of one of their members, twelve young men, all veterans of the recent war in France, and all from the best New York families are found unconscious in the drawing-room of a Fifth Avenue mansion. A thirteenth, the engaged man, lies dead, apparently poisoned. The murderer, for it proves to have been murder, must have been one of the twelve drugged men, but which? Due to the sensitive nature of the case, it falls to detectives Winter and Furneaux to find the culprit. They must act, and act quickly to avoid another tragedy in . . . The House of Peril.