Brigade Commander Xu Ling Jun is assigned to lead a military transformation pilot program. Despite challenges, he trusts Battalion Commander Guo Zi Jian, who proves himself after a past training accident. In a crucial exercise against an undefeated opponent, they use their innovative tactics to turn the tide.
Yang Ling, a modern office worker, is transported to the Da Feng Dynasty, where he becomes Xu Qi An, a "copper gong" night watchman. Using his modern knowledge and reasoning, he solves bizarre cases, earning the title of top investigator. In a world of magic, monsters, and court intrigue, he and his companions fight against dark forces to protect justice and the people of Da Feng.
