Mortal Tie Jian is an orphan with no sword soul in his body. Since childhood, he was adopted by sword refiner Chen Guang and grew up with each other. Tie Jian will acquire the supernatural power of a thousand-year sword master by chance.

War tears Wenzhou apart, forcing twins Ye Ning and Ye Qing onto opposite paths: Ye Ning becomes a pawn of militarism, while Ye Qing emerges as a guerrilla sharpshooter. When they face each other on the battlefield, will family ties survive the clash of duty and patriotism?