Fang Yu, a young man living alone, is jolted awake by the doorbell at half past three in the morning, but when he opens the door, no one is there. After that, strange events come one after another: the security cameras mysteriously stop working, cryptic letters keep appearing, and nightmares follow him like a shadow. As he searches for the truth amid a tangled web of mysteries, he discovers that everything is connected to a family secret and an ancient, sinister ritual. And danger is closing in, step by step...
