Dr. Serena is a gifted young surgeon working at one of the most prestigious hospitals in the city. After losing her parents in a tragic car accident, she's devoted her life to caring for her younger brother, Ethan, who is all she has left. Her days are consumed by the hospital, her nights by the quiet solace of home-until everything changes. One fateful evening, as Serena walks back home after a late shift, she stumbles upon a horrifying scene in a dimly lit alleyway: a man in a black mask, dressed entirely in shadow, ending someone's life with terrifying precision. Paralyzed with fear, she locks eyes with him. His gaze is cold, calculating, and filled with something dark. The moment feels eternal until he begins walking toward her.