In a modern city, there is an unknown supernatural world hidden. Rough detective Li Yan solves various bizarre cases with his unique intuition and unconventional style. Su Qing, a metaphysics girl, has the ability to interpret yin and yang, but her fate is intertwined with Li Yan's due to an accident. While the two uncovered the truth about urban legends and supernatural events, they also gradually uncovered each other's past and secrets.
