When a demon cat appears and breaks the peace of Chang'an City, causing a series of strange events, poet Bai Letian and monk Kukai join hands to investigate the death of the emperor's concubine by following the trail left by the cat.

Taking place in the Tang Dynasty, a demon cat appears and breaks the peace of Chang'an City, causing a series of strange events. Poet Bai Letian and Monk Kukai join hands to investigate the death of the emperor's concubine, Lady Yang, by following the trail left by the cat.