Former movie star Nora Chandler is furious when she learns that trusted secretary Jean Davis is about to marry gossip columnist Jerry Parks, especially since Parks is blackmailing Nora. Nora cannot let the wedding take place. She blows up Jerry's car, killing the driver instantly. But she has killed not Parks, but secretary Jean! Nora struggles to deal with two suspicious men: Parks, who thinks he knows who the intended victim was, and Lieutenant Columbo, who has his own reasons to zero in on Nora..