Ning Bei suffered a family rebellion when he was young, and fled to the northern border alone. For thirteen years, he honed himself as the invincible god of war in the northern border, and protected his home country with a northern king sword. One day, Ning Bei returned to dragon city and faced the battle again. Once love and hatred, his road to revenge began.

宁北幼年遭逢家变，孤身逃亡北境，一十三载岁月，磨砺出战无不胜的北境战神，一把北王刀护家国安泰，终有一天，宁北返归龙城，重新面对曾经的爱恨情仇，他的复仇之路就此展开。