Young Arnold Haithwaite's life in the sleepy village of Skirlston is happy and uneventful, until a stranger arrives --- the sinister, one-eyed Sonny.

Arnold Haithwaite discovers the secret of his indentity. The villainous Sonny finds the opposition getting tougher. Arnold has been fighting to save his home from Sonny who wants to make it into a hotel. He is unsuccessful in his fight against him until hep from an unexpected quarter arrives. Meanwhile Jane, the spoilt young girl from the manor house, finds her headstrong ways are putting her life into danger.