Falling back in love with his ex may be more dangerous than being trapped on an island… Brenna Coleman's past has caught up to her on the island of St. Sebastian…and she's not happy to see him. FBI agent Casey McBride has a job to do, and he won't let feelings for his ex-fiancée foil his mission. While investigating the activities of Marcus Bradley—a powerful billionaire commissioning a series of Brenna's paintings—Casey discovers the island's darkest atrocity. With Brenna at his side, he can't ignore the love they once felt—and still feel—for one another. But as Casey keeps close watch on Brenna, one question remains uncertain: Who is keeping close watch on them?