Bill Fleming's wife cheats on him constantly, and it's public and humiliating. A friend named Sandy tells him about a California blue law that prevents a man from being prosecuted for murder if one engages in an honorable duel with swords. Bill decides to challenge his wife's current boyfriend to a duel with the swords that "dangle like a cook's spaghetti" around the house. When he does so, the boyfriend cowers and eventually falls to Bill, slain through the stomach. Bill turns himself into the police and goes to trial. As a former prizefighter and renowned sportsman, Bill has the favor of the jury on him and is acquitted. However, the judge pulls him aside and talks with him and his defending attorney. Bill must deliver a substantial sum of money to the man's next of kin for the remainder of his life. The next of kin just happens to be Sandy...who is also Bill's wife's latest boyfriend.