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. (Source: Viu)

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

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.

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.