Although demure young beauty Kezia Falcon and her brother Perry are part of an ancient and noble family, they are all but bankrupt. Nevertheless, handsome Perry socialises in London while Kezia lives alone but for the old butler in the family’s ancient but dilapidated house. Suddenly it seems their fortune may change when Peregrine finds a buyer their one precious heirloom: a necklace made with diamonds stolen from the legendary ‘Marie Antoinette Necklace’. The buyer is the French Marquis de Bayeux who is coming to visit and view the necklace. But, because he is a notorious ‘Don Juan’ with whom no woman is safe Perry, insists they pose as a married couple for Kezia’s protection – a charade they will come to regret when the dashing Frenchman inspires in Kezia not fear, or dread but awe and then, finally, love.