Just about any of the guests at Johnny Redfield's party seems to have a good reason to have killed the guest of honor, Johnny's Californian aunt who, with her astral name and vague pretensions of mysticism, does not exactly blend in the elegant New York atmosphere that surrounds her. And what's more, no one has a solid alibi. It will take all of Henry Gamadge's ingenuity to figure out this closed-room mystery.