Xu Qi An uses 20 Exhortation to Learning poems to convince Scholar Zhang Shen and Li Mu Bai to let his female family members stay in the academy. When Huai Qing sees his "Exhortation of Learning" poem collection, he is secretly impressed.

During a team-building activity playing a murder mystery game, Yang Ling unexpectedly travels to a world called Dafeng, taking on the identity of a constable at the Changle County Yamen—Xu Qi An.

Xu Qi An dreams of becoming a Night Guardian. But after solving the case, he is forced to go through report after report every day at the yamen. It's torturing.

While Xu Qi An is being escorted, Xu Ping Zhi attempts a rescue but is outnumbered. He ends up being imprisoned in the Ministry of Justice’s dungeon together with Xu Qi An.

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Officials of the imperial court are fighting for the position of Minister of War. Wei Yuan gives up on the opportunity and asks for Xu Qi An to be spared.

Xu Qi An decides to remain in this world and live well. His first goal is to make money.

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Jiang Lv Zhong, Nangong Qian Rou, and Yang Yan have a disagreement and take it to the training grounds for a fight. Xu Qi An, ever curious, rushes over to watch the spectacle, only to discover that he himself is the cause of the conflict.

Huai Qing sends someone to find out more about the attack on the Silver Guardian. What she finds increases her admiration and respect for Xu Qi An.

Xu Qi An and the Night Guardians investigate Sangbo Lake. They find a formation underwater...

Wei Yuan takes Xu Qi An to the palace. He wants him to find Princess Royal to proceed with the investigation. Huai Qing's personal eunuch comes to lead the way. He asks him about his relationship with Princess Lin An...

Huai Qing tells Xu Qi An the story of Princess Ping Yang, who has fled her arranged marriage and run away from home. Meanwhile, Lin An is frustrated over how Xu Qi An has chosen to serve Huai Qing instead.

Xu Qi An reports to Wei Yuan that the clues he discovers are pointing towards Qinglong Hall. Tiandi Society's No. 6, Heng Yuan is also missing.

Yang Qian Huan teams up with four Gold Guardians to fend off Heng Hui. Heng Hui is devoured by the demonic arm. He escapes after receiving a devastating blow. Yang Qian Huan knows that Xu Qi An, the main investigator of the case, is quite capable. He thinks of him as a formidable foe.

Zheng Xing Huai is executed. When Xu Qi An finds out, he arrives at the palace gate. Wei Yuan advices Xu Qi An that it's not the right time and asks him to go back.

Xu Qi An makes Que Yong Xiu confess that Lord of the North massacred the city. The Imperial Guards arrive at the scene. Tiandi Society and the Night Guardians show up to stop them.

A ceremony is held at Sangbo Lake. As Xu Qi An is guarding over the area, the Jade Mirror suddenly emits a sound.

Xu Qi An and the rest are beaten up in public by the Silver Guardian leader, Zhu Cheng Zhu. Xu Qi An endures every difficult moment and humiliation thrown at him by Zhu Cheng Zhu.

Xu Qi An encourages Lin An to pursue her freedom, and it motivates her.