Tara Fitzgerald stars as Lady Dona St. Columb, an affluent Londoner who takes refuge from stifling London society at her family's estate on the Cornish coast. It is there that she meets Jean Aubrey (Anthony Delon), a dashing French privateer who promptly offers her a life of romance and excitement. Leaving her dull husband, Sir Harry (James Fleet), Lady Dona takes to the high seas with her lover, but their plot to steal a ship from the English results in her having to choose between a life of duty with her husband or a life of adventure with Jean. Based upon the novel by Daphne Du Maurier.