Kurt Ingston, a disabled rich recluse, invites his three physicians to visit his marshland estate under the guise of donating money to medicine. As night falls, one by one, the doctors meet a brutal end, and anyone—the ominous butler, grim housekeeper, lecherous chauffeur, enigmatic mystic, and Ingston's unstable sister—could be the killer. © 1942 Universal Studios. All Rights Reserved.