Peter Harding is a corporate executive who tries to help save the sagging career of an associate named Philip Bartel. He hopes to get Bartel into one of the corporation's very popular training courses. Later, however, Harding discovers that Bartel is interested in leaving his wife Beatrice. He wants to run off with his mistress. Harding becomes intent on helping Bartel in his home life. He decides to do this by taking Bartel's mistress of his hands.

Laura Needham is murdered while vacationing in Mexico. Her husband Mark discovers that the police are holding as a suspect an American named Theodore Bond. Mark wants something to be done, but the police are helpless because they cannot prove their case. Mark decides to get the proof, but he is murdered by Bond instead. Mark's in-laws, Alex and Louise Trevor take it open themselves to bring Bond to justice. They set up a trap with Louise as bait and catch Bond attempting to committed murder.