Clare Hart thinks she's a fairy.

Not really, but she writes romances between fairies and humans, and she'll do anything to turn her stories into real-life movies.

On her way to Ireland, she meets a mysterious man who claims he's over a thousand years old.

Clare doesn't believe him, but he's wealthy and sexy and a wee bit daft.

He promises to give her the money if she can use the Heart of Brigid to bring back his lost love, a powerful fairy princess.

Clare uses her imagination to mesmerize the billionaire into believing she is the fairy princess, but her trick isn't so funny when she finds herself imprisoned underground in a dungeon bedchamber fit for a queen—a dead one.