An architect (Chick Chandler) studies the doors of six shops and an apartment house to solve a gem theft/double murder.
as Jimmy McMillan
as Mary Rawling
as Charles Eaton
as Capt. Wm. Jaffe
as Henry Butler aka Gregor (as Gregory Gay)
as Claude Burns
as Mable De Rose
as Donald Adams
as Timothy Green
as Detective Morgan (uncredited)
