Lin Shen, a nurse at a mental hospital, lives his life in the presence of disinfectant and crazy words day after day, but he still cannot escape the torment of strange headaches - the ancient whispers wandering in the cracks of memory and the strange shadows that cover the sky are like curses dormant deep in the blood. Until the mysterious patient Su Jiuli entered the ward at the end of the corridor with a book full of tadpole runes, the illusion of calm was completely torn apart.
When Su Jiuli's fingertips ignited with blue flames, and when the strange beasts recorded in "The Classic of Mountains and Seas" appeared in the moonlight, Lin Shen was forced to face the shocking truth behind his missing memory: he was actually the last successor of the ancient bloodline, and this world had been penetrated for thousands of years. The seal is about to break, and the peepers dormant in the darkness of the mental hospital are ready to take action. A fateful showdown spanning the present world and the ancient world is quietly brewing under the mottled neon lights of Shanhai City...