A cruel Roundhead Colonel is on the trail of royalist sympathizers, but unaware of his daughters royalist sympathies. When she falls into a love triangle with Cavalier Edward Beverly and Roundhead officer Captain Sylvester the stage is set for double crossing and derring-do.

• Hammer Film Productions
• Associated British Picture Corporation
• Lionel Jeffries
• Oliver Reed
• Jack Hedley
• June Thorburn
• Michael Ripper
• Harold Goldblatt
• Duncan Lamont
• Clifford Elkin