Headstrong Rose Tremayne, housemaid to the snobbish Lady Carclew of Nancemellin House, has a talent for mimicry which frequently leads her into mischief.

Dressed in her mistress’s clothes she discovers Louis Redmile-Smith, half drowned on Nancemellin’s beach and he assumes Rose is Lady Carclew’s ward. When he returns to thank Lady Carclew, Rose’s deception is discovered and she is dismissed, but Louis is not so easily swayed from his devotion to her.

Finding the stage more suited to her talents, Rose’s career leads her towards the London music halls, but is she also being led further away from Louis?