Jake is hired by a wealthy man named Underhill to see if his wife Velma is having an affair. Jake follows Velma that night, and as she arrives home he hears a shot ring out from the house. Rushing inside, he finds Underhill shot to death in his den, and a bullet hole in the window. Velma's boyfriend is arrested for the murder, but Jake doesn't think he's guilty. As he begins his investigation, he discovers many suspects and a bizarre method of attempted murder.