Seventeen-year-old Shen Ye just wanted to live an ordinary life - until the night of the Ghost Festival, when he dug out a fragment of "The Classic of Mountains and Seas" from his grandfather's old wooden box. The fragmentary scroll turned into a mountain and sea seal, and also turned into a countdown of one thousand and ninety-five days on his wrist: Collect nine key seals within three years to reseal the gate; otherwise, if the gate is opened, he will die.
The night in Linjiang is no longer peaceful. In the library, cockroaches are hunting, the underground gate of the old city wakes up, Qiongqi opens his eyes and asks for directions in the painting, and the pure-blood school beauty hides a secret from eight hundred years ago. With a seal, a best friend with a gluttonous stomach, and a pair of eyes that can read the original inscriptions of the Book of Mountains and Seas, Shen Ye upgraded his face all the way - and the eldest lady of the Bai family, the psychic senior sister, and Qingqiu Jiuwei were all waiting for him in this game of chess.
But when he walked through the door and saw the living world of Shan Hai Jing, he realized: Zhulong was never waiting for the door to open, but for the day when the door "came alive". Those who close the door must keep their mind open. Shen Ye, the seal keeper, wants to finish the game for the first generation eight hundred years ago.