Ann Harding plays a lovely but somewhat naive young woman who goes on a European vacation after winning a lottery. Swept off her feet by charming Basil Rathbone, Harding finds herself married before she is fully able to grasp the situation. Slowly but surely, Rathbone's loving veneer crumbles; when he casually asks Harding to sign a document turning her entire fortune over to him, she deduces that her days are numbered.

Cutthroat pirate William Kidd captures Admiral Blayne's treasure ship and hides the bounty in a cave. Three years later, Kidd, posing as a respectable merchant captain, offers his services to the King of England. Seeking a social position, Kidd also negotiates for Blayne's title and lands, provided he can prove Blayne was associated with piracy. Launched upon his royal mission, Kidd is unaware that Blayne's son Adam is among the crew, determined to clear his father's name.