A mysterious jeweler is kidnapped, and a gang demands he copy a valuable necklace. To help the granddaughter find him, a detective's identity is assumed by a man who joins the chase, which culminates in a thrilling train pursuit through the London Underground.
Alias Bulldog Drummond
A man, recovering from a car crash, takes on the persona of Bulldog Drummond to help Ann Manders locate her kidnapped grandfather, a jeweler, who is being coerced by a criminal organization to create a unique gemstone.
