Chen Mo, a boy from a village in the city, has been with a rusty copper lock since he can remember. He thought he was just an ordinary young man struggling between rent and livelihood, but he didn't know that this lock contained a secret that could subvert the three realms - knocking nine rings in the middle of the night can open doors to other worlds, and snake patterns on the lock body will attract strange things.
The taboo instructions given by his adoptive father before his death, the yellowed old photos unearthed from the scrapyard, the black scale slime crawling up the crack of the door late at night, the scarlet blood words counting down three days, and when strange events followed one after another, Chen Mo was shocked to realize that his eyes, as black as an ancient well, did not belong to this world at all.
The mysterious guidance of an unknown number. The ghost in a Chinese tunic suit under the locust tree. The squirming mass of scales in the woman's arms. The hanged ghost with braids in a copper lock. All the clues point to a dust-covered truth. He is not an orphan, but an abandoned key in the gap between two worlds.
When the rent reminder and the death warrant from another world were placed in front of him at the same time, Chen Mo clenched the copper lock and realized that the so-called fate was just a thunder hidden in the daily necessities of mortals that gods and Buddhas did not dare to touch.
Pretty good-looking, right?