he Lytton family owns a museum. Siblings Ruth and Edward (curator and trustee, respectively) have devoted their lives to it, but with things not going so well, Edward has decided to sell it. Ruth doesn't agree and plans otherwise (the old-fashioned way). She has a niece, Janie, whom she loves more than her mother does, who has hired Milton Schaeffer, a petty thief and inveterate gambler (and the brother of her (Janie's) lover), as their new security guard. With a subsequent double-homicide on hand utilizing these details, Columbo delves into the family's personal history to help unravel spinster Ruth's ruthless scheme.

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