On the edge of the two invisible worlds, there is a secret police force that travels between Yin and Yang to hunt down criminals who cross the boundary between life and death. The protagonist, Ouyang Zhenhua, is an ordinary police detective in the city during the day, and transforms into a yin and yang law enforcer at night, uncovering layers of fog and shocking secrets hidden between the human world and the underworld, and working with his colleagues to protect the peace of the yin and yang worlds. Until the appearance of Ghost King Yin Shiwu, everything will undergo earth-shaking changes...
