Prince Richard of Laurentia is summoned from exile with his mistress Marta (Anna Neagle) in Monte Carlo, to resume Royal duties following the death of his father, the King (Finlay Currie). He is charged to marry Princess Cristiane of Norseland (Patrice Wymore) and produce an heir to the throne. Although Richard's affections are with his mistress, he soon finds his heart warming to his new wife.