The fundamental law called "Yuanli" circulates between heaven and earth. Only those with "literary heart" or courage can activate Yuanli and speak the law.
However, in the troubled times of the late Tang Dynasty, discipline was loosened and people who abused their power abounded, resulting in frequent divine punishments and stubborn rocks and rotten trees everywhere. Shen Yan, a night guard from hundreds of households, investigated the murder case of stubborn rocks on Zhuque Street due to the case of his mentor's disobedience.
