After catching her boyfriend Justin cheating, Nina meets hot hockey captain Enzo at a party. A known one-night-stand player, Enzo agrees to a no-strings night with Nina—but feelings spark. Nina soon learns Enzo’s “one-time rule” is deadly: anyone he sleeps with twice dies… unless they’re his fated mate. Their romance is thrown into chaos: Enzo’s obsessive ex torments Nina, Nina’s hybrid nature emerges (making her sister Selena target her to escape the Lycan World), Enzo fights for his pack’s human-world status via a hockey tournament, and his father forces a marriage to Selena. When Selena kidnaps Nina to the Lycan World and impersonates her, Enzo uncovers the lie, saves Nina, and they sleep together a second time—proving she’s his fated mate. Enzo proposes (with a new rule: no sex without engagement), and they find their happy ending.
