A strange paper figurine eye-dotting incident occurred in the Chen family's paper-making shop, which heralded a bad omen. The Chen family suffered a tragedy on a rainy night. The dying old shopkeeper uses the method of blood sacrifice to awaken the hidden mechanism of the town compass. When the protagonist Chen Du escapes through a secret passage, he is fatally intercepted by the yin-yang puppet technique.
The bronze coffin nails left behind at the scene of the massacre alluded to the secrets of Erbasu Town Mausoleum, and Chen Du began his journey to solve the mystery.
