Patricia Roc

An American’s investigation of his soldier brother’s death during a commando raid uncovers shocking secrets buried deep in post-World War II Britain.

In 17th-century England, Barbara Worth (Margaret Lockwood) lives a privileged yet humdrum life as the wife of well-heeled landowner Sir Ralph Skelton (Griffith Jones). To stave off boredom, Barbara begins impersonating famed highway robber Capt. Jerry Jackson, stealing precious jewels and valuables from coach passengers. A chance encounter with the actual Jackson (James Mason) propels Barbara into a dangerous double life with potentially lethal consequences.

1940. A foreign scientist selling a secret weapon to the British is badly injured in a car accident and is operated on by a surgeon. After the operation he dies mysteriously. An investigation follows.