Joyce Van Patten stars as Ruth Lytton, the never-married head of the family-owned museum that has been sadly losing money. Her caring but stern brother Edward(played by Tim O' Connor) has decided to convince their sister(played by Celeste Holm) to close the museum, which is something Ruth cannot allow, so she concocts a surprising(for her) plan to murder him, blaming it on a guard with a shady past, then killing him too. Lt. Columbo(Peter Falk) doesn't believe it was a botched robbery, but how to find proof against the spinsterish Miss Lytton? Oddly flat episode isn't that compelling, but is still innocuous enough to make it passable fare.