In 1930, Diana Baring (Norah Baring), a young actress in a travelling theatre troupe, is found in a daze with blood on her clothes, standing by the murdered body of another young actress, Edna Druce. The poker used to commit the murder was at Diana's feet, but she has no memory of what happened during the minutes the crime was committed. The two young women were thought to have been rivals, and the police arrest her. Diana withholds some important information deliberately, to protect something about the identity of a man that she will not name.