Sir John Somerville's current paramour, Lizzie, secured a post as maid to heiress Mirabel Cheriton, who had arrived from Jamaica for a Season in London. It was the hope of Mirabel's family that she would find a titled husband. For Sir John it was the opportunity for revenge - it had been Mirabel's father who, years before, had cheated the Somervilles out of all they had owned. John Somerville sets out to court Mirabel and the plan succeeds, except for one thing - he finds himself falling in love with her.