When history professor Chen Mo and talented young man Lin Xiaoman mysteriously traveled through the library, they took their modern military knowledge and fell into the troubled times of the Southern Ming Dynasty in the 17th year of Chongzhen. At this time, the iron heel of the Qing army had broken through Shanhaiguan, and the Hongguang regime was teetering on the edge of party strife and warlord separatism. Classics such as "Tiangong Kaiwu" and "Arena of Arms" that were supposed to be passed down to future generations were being burned, and the inheritance of firearm technology was on the verge of being cut off.
