Synopsis：After twenty years apart, Avril is thrilled to finally reunite with her sister—only to learn she has died under mysterious circumstances. Was it suicide, or cold‑blooded murder? Who is the real hand behind her death? To uncover the truth, Avril assumes her sister’s identity and hides in the shadows, luring the demon out step by step, and gradually exposing a far‑reaching conspiracy fueled by money, desire, and the darkest corners of human nature…