Sixteen-year-old Megan Crenshaw has everything going for her, until a leprechaun shows up on her doorstep and steals all her luck. If that weren't enough, he follows her around, making sure nothing goes right. What Louie didn't count on was Megan's friends standing by her. No matter what he throws at her, they're by her side to pick her back up again. When Megan learns about Louie's ultimate plan for her family, it's a race against time to stop him before he destroys everything she cares about.

Megan finally has her luck back and hopes that life will return to normal. She's determined to make her senior year perfect to make up for the year before. Unfortunately, the magical world has other plans. She suddenly has a fairy guard who won't leave her alone, dragons become a constant threat, and an imp tracks her every move. Megan has had it with Louie the leprechaun, and must find a way to get rid of him once and for all. As she fights the creatures he's sent after her, Megan's luck begins to manifest itself in ways she could never imagine. Now, she must learn to harness that power to stop Louie, and protect her family from the evils that threaten her very existence.

Megan has had it with leprechauns. They want nothing more than to take over her luck—something she’s not willing to give up. After finding herself locked in a dungeon on Christmas morning, she vows to take O’Malley down. Between trying to have a normal life in high school, and fighting various fairy tale creatures thrown in her way, Megan barely has time to breathe. But when a mysterious darkness begins to snatch the fairies and leprechauns that have protected Megan and her family, she must learn the history of her luck and defeat the bad guys once and for all.

Megan hadn’t been planning on sharing a plane trip with a baby leprechaun. She also hadn’t expected to run from monsters or fight for her life while on vacation. But her life hasn’t exactly been normal for a while now. And she’s not okay with that. Now it’s time for Megan to learn what she’s made of—both her strengths and weaknesses—before everything is taken away from her for good.

Adam Crenshaw is tired of living in his little sister’s shadow. She wins everything, and he gets the leftovers. Big brothers are supposed to be the role models, right? Then one day, all that changes. Louie is a leprechaun who offers him all the luck he could possibly want—for a price. The offer is tempting, but Adam refuses to work with him. To teach him a lesson, Louie steals all of his luck, and Adam’s life is turned upside down. He now has a choice between giving in to the leprechaun’s demands, or losing everything that matters to him.