Thomas P. Manning, businessman and chess expert, mysteriously shot in a locked room, dies clutching some chess pieces. Police are baffled, and finally abandon the case. Six months later, victim's daughter Leah Mannin…
Eccentric scientist Harper lives in a spooky mansion with all the trimmings: hidden lab, secret panels, inscrutable butler, and greedy relatives with unusual talents. When Harper seems to be murdered, Charlie Chan (with …