Meet Ellen Sheppard, an American living in Britain. Her English husband, Jason Sheppard, has been killed and she's under suspicion despite the appearance of a happy marriage. Jason's friend assists Ellen go over the facts to see if they can find the real killer.

After the battle of Worcester at the end of the Civil War, the main aim of Oliver Cromwell's Commonwealth is to capture Charles Stuart. The future king's escape depends on the intrepid Earl of Dawlish, who as the Moonraker has already spirited away many Royalists. Dawlish travels to the Windwhistle Inn on the south coast to prepare the escape, where he meets Anne Wyndham, the fiancée of a top Roundhead colonel.