Rex Harrison's extramarital relationship with Patricia Wayne comes to an end when Wayne is murdered. All evidence points to Harrison; we know that he's innocent, but the detectives don't have this advantage. With his faithful wife Lilli Palmer at his side, Harrison goes on trial for his life. Anthony Dawson, the genuine murderer, intends to confess after Harrison is hanged. Thanks to a governmental quirk, Dawson's letter reaches the authorities just a few steps ahead of the hangman. Anthony Bushell, co-director of Long Dark Hall, is featured as Harrison's defense attorney. The film was co-scripted by Hollywood's Nunnally Johnson and based on a novel by Edgar Lustgarden.