London. A mysterious serial killer brutally murders young blond women by stalking them in the night fog. One foggy, sinister night, a young man who claims his name is Jonathan Drew arrives at the guest house run by the Bunting family and rents a room.

A Canadian returns to find his fiancée is married and schemes revenge.

A chauffeur becomes an officer and later cares for his master's widow and child.

"A wealthy young man, through losing the bulk of his fortune, goes to Canada, where he encounters and loves the daughter of the scoundrel lawyer who has robbed him." (Synopsis from The Bioscope, November 1930.)