At eight years old, Shen Du pressed his fingerprint onto a document, thinking it was just to make Grandma happy. Only later did he learn that his left eye had become the Underworld's surveillance camera: each use added a debt, and once it reached ten marks, it would take his memories and years of life. But he unexpectedly discovers that this eye can record the Underworld breaking its own rules. Who's watching whom? This poor man under surveillance is going to renegotiate his contract with the Underworld.
