The mysterious vigilante Milton has warned Scotland-Yard of his intention to kill the lawyer Maurice Meister who is the cause of his sister's suicide. Police and detectives watch over the lawyer's home, but on the day and at the appointed time Meister is murdered.
as Lawyer Maurice Meister
as Inspector Berry
as Cora Milton
as Mary Lengley
as Doctor Lomond
as Inspector Bliss
as Sam Hackitt
as Colonel Davis
as Johnny Lengley
as Thomas, detective
