Murder!

Diana Baring, an actress in a touring company, is discovered near the scene of the crime when a woman is found murdered. She is charged with the murder, placed on trial and convicted on circumstantial evidence. One of the jury, however, Sir John Menier, believes in her innocence and undertakes to prove it. His personal investigations take him to the touring company where he questions members of the cast, and others. Through the girl's landlady he hears that a man's voice was overheard near the scene of the crime, on the night of the murder, and eventually he tracks down the killer in an exciting climax in a circus tent.