During the reign of Emperor Renzong of the Northern Song, the court had only just stabilized, yet undercurrents of trouble were already stirring. Conflicts between the martial world and the imperial court quietly spread through towns and villages. Bao Zheng, a gifted scholar from Luzhou, set out on his travels, armed with meticulous insight and an unwavering sense of justice, only to be drawn into one strange mystery after another. At an ancient temple bustling with worshippers, he met Gongsun Ce, an erudite but arrogant scholar from Yangzhou. He also crossed paths with Zhan Zhao, the Southern Hero, who was tracking a band of thieves. The three went from testing one another to solving cases together, and soon became friends willing to lay down their lives for each other. Chuchu, an innocent and lively village girl, helped with the investigation and joined the group, becoming its cheerful heart and logistical backbone.
From the bizarre murder of the Blood Buddha in an ancient temple to a disguise plot involving a haunted house and painted skin; from the theft of disaster-relief silver after a canal shipwreck to the decades-old feud behind a theater troupe's puppets, the four traveled north and south, searching temples, mansions, borderlands, and the imperial palace as they solved 25 new cases. Locked-room murders, serial crimes, collusion for power, and martial-world feuds: every case revealed both human kindness and cruelty, as well as society's hidden wounds. Gongsun Ce used his knowledge of divination, medicine, and poisons to aid the investigations. Zhan Zhao protected the group with his formidable martial skills. Chuchu used her knowledge of herbs and her innocent nature to defuse crises, while Bao Zheng always measured each case against the law as he sought the truth through the fog.
As they investigated, the four grew closer through every storm: Bao Zheng and Chuchu fell quietly in love, while Gongsun Ce and Zhan Zhao went from clashing with each other to becoming kindred spirits. As the cases grew more complicated, Bao Zheng unexpectedly stumbled upon the mystery of his own birth, and a vast conspiracy involving secrets of the imperial court gradually came to light. Faced with schemes by corrupt court officials and counterattacks from martial-world forces, the four stood firm in their pursuit of justice
