John Bedford fights with his aunt Lady Elizabeth Ferguson, who believes he stole her emerald brooch. Then she is murdered. Scotland Yard is on the case and thinks her nephew was behind it. But it turns out that John has an airtight alibi.

Young John Bedford fight with his wealthy old aunt Lady Elizabeth Ferguson, who is sure that he stole her emerald brooch; the next morning, Lady Elizabeth is found murdered. Scotland Yard Inspector William 'Bill' Trent is on the case and he thinks her nephew was behind it. But it turns out that John had been in jail all night because of public drunkenness.—Robert