The Dayong Navy suffered a series of defeats, and the barbarian iron-clad cavalry had reached the river bank. Chen Wangbei, who traveled through time and became a good-for-nothing to join the army, threw his first iron-clad fireship with the intention of exploding its barrel, but unexpectedly blew the enemy's flagship into two pieces. Baihu Liu Jingshuang, who is disguised as a man, is eyeing this 'witchcraft'. Shen Moyan, a genius from the Ministry of Industry, secretly covets the blueprints, while rebel division Di Heming is waiting to expose his origins. The fire ship tactic is just the beginning. Chen Wangbei wants to use steel and gunpowder to blast a way out of this era of collapse.