In the winter of 2025, the first mystery was hidden in the pig head butcher shop in the Nancheng District of Shanggu - butcher Zhang Tu died in the cold storage, with a hole in his skull and missing brain tissue. The word "debt" on the knife handle was like a curse, which kicked off a series of mysterious cases.
Former detective Song Xunxing carries half a rubber pendant and a notebook with unfamiliar handwriting on it, and pursues the murderer as a private detective in the shadow of a wrong case. The campus burial case three years ago left her burdened with guilt. Now the handwriting on the notes and the vague memory gaps are all hinting that there may be another truth hidden in her world.
