A modern supernatural horror novel that combines the Cthulhu mythology and the culture of Jiangnan in China. In the Linyuan City Museum late at night, ancient book restorer Gu Muchen worked alone. When restoring an ancient Ming Dynasty book "Linyuan Zhiyi", he discovered a strange parchment sandwiched between the pages, with disturbing geometric patterns drawn on it. When he tried to trace the pattern, the shadows around him began to twist abnormally, and the characters in the ancient books seemed to come alive. . . The ruins of the ancient "Abyss Order" are hidden underground in the city, connected to the terrifying existence of another dimension.
