Adapted from the lost television series "Inspector Morley, late of Scotland Yard, Investigates".
One of the episodes used to create the film was "The Green Eye," about the kidnapping of a girl who is the owner of the Emerald Eye. The crime was masterminded by, as it turns out, her uncle who has apparently had it in his keeping since her father died. Unfortunately for him, it turns out the gem he stole was in fact a fake, his wife having sold the real Eye years ago.