Stan Philips and his partner are running a blackmail scheme on members of the club that they work together. One of their victims, Dr. Warren, who is married, is having an affair with the club singer and Stan is blackmailing him for $1500 a month, in turn Dr. Warren knows Stan is not blind and can see. Stan murders Dr. Warren to keep him from spilling the beans about his sight. Barnaby suspects Stan, but must find a way to prove he is a murderer and not blind.
—charmardee-smith