In the City of Lights, two star-crossed lovers are destined to leave each other again and again, endlessly. When Kate Mercier's parents are killed in a car accident, she leaves her life—and memories—behind to live with her grandparents in Paris. For Kate, the only way to survive her pain is to escape into the world of books and Parisian art. Until she meets Vincent. Mysterious, charming, and incredibly handsome, Vincent will be able to melt the ice around Kate's heart with his smile. As she begins to fall in love with Vincent, Kate discovers that he is an Beyonder—an undead force forced by fate to sacrifice himself, again and again, to save the lives of others. Vincent and his ilk are locked in a centuries-long war against evil groups that exist only to kill and betray. Kate soon realizes that if she follows her heart, she will never be safe again.