Flamboyant television chef Dexter Paris and his twin brother, Norman, a conservative banker, are supposedly not talking to one another. But both disapprove of their wealthy uncle Clifford's impending marriage to a young woman. One of them enters Clifford's bathroom and drops an electric mixer with a frayed power cable into Clifford's bath water. Clifford is electrocuted, and the murderer takes Clifford's body to an exercise room to make it appear that Clifford died of a coronary. But Lieutenant Columbo, the infallible, cunning detective in a rumpled raincoat, suspects foul play and believes that the Paris twins, both heirs to their uncle's estate provided he didn't marry, had a motive for murder. But which one did the deed? Columbo pursues both with incessant questions as he tries to determine which of the two brothers killed their uncle Clifford. Written by Kevin McCorry