Lin Chen, a modern ordnance engineer, traveled to a different world called the Yan Dynasty, where martial arts were respected, and became the much-scorned useless son-in-law of the Su family, a family in the south of the Yangtze River. On his wedding night, he was humiliated, and his clan members forced him to dig into his crotch to serve tea. When everyone thought he would swallow his anger, Lin Chen took out a six-barreled rotating Gatling gun from the military space he carried with him... From then on, a legend of using modern military technology to crush martial arts and rewrite the dynasty began.