When Lin Mo, an ancient book restorer, bought a mutilated copy of "The Classic of Mountains and Seas" from a mysterious stall owner, he didn't know that he had stepped into a world that had been deliberately hidden for thousands of years. The strange beasts recorded in the book are not myths, but real existence - and they are awakening.
As new words appeared on the pages of the book under the moonlight, the same mark as the nine-tailed white fox in the dream appeared on Lin Mo's arm. Su Yuqing, a mysterious woman who calls herself the "Guardian", suddenly visits and brings a breathtaking truth: this "Book of Mountains and Seas" is not a record, but a **seal**. But now, the seal is failing.
The night of the full moon is approaching, and the ancient existence is about to return to the world. Lin Mo must cooperate with Su Yuqing to find the three scattered volumes before time runs out. Otherwise, the expelled alien beasts will tear apart the barrier between the two worlds and bring about a disaster that humans cannot bear.
