Mia is a penniless young woman crushed by debt, a ruthless landlord, and dangerous street thugs. One stormy night, she takes in an injured black dog—only to discover that he is actually Alessio De Luca, a powerful mafia don cursed by his enemies and trapped in canine form. Mia soon learns that her kiss can temporarily restore Alessio to his human body—and slowly awaken the power of his blood ring. Bound together by fate, the two are drawn into a dangerous relationship fueled by redemption, obsession, desire, and deadly secrets. But as their connection deepens, the Russo family sets its sights on Mia, determined to eliminate the only person capable of breaking Alessio’s curse for good.