John Blair, the District Attorney of a large city, is a drug fiend, and on the day he is to sum up the People’s case in a celebrated murder trial, he finds that he is unable to continue. A young lawyer, named Gary, who has followed the case, calls upon Blair, seeking employment. The following scene is achieved by a double exposure which is perfectly accomplished. Confronting each other, the similarity of their countenances astounds them both and it gives Blair an idea. He offers Gary $1,000 to exchange positions with him. Gary agrees and they exchange apparel. Blair goes to the poor lodgings of Gary, while Gary, accompanied by Blair’s wife, who has not detected the substitution, goes to court. With an eloquent summing up Gary wins the case. It is then he breaks the news to Mrs. Blair. She is at first unconvinced, but finally they both go to Gary’s hoarding place where they find the real Blair dead. His good name and the reputation of his family are at stake, so a compact is arranged, whereby Gary becomes Blair and the real Blair is buried as Gary, the unknown.