When the cold blade broke the flag, Li Guhong guarded the isolated city alone for seven days, his armor stained with blood but did not take a step back; when the city was broken, he saw Xie Jinchen open the city gate with the rebel order and personally cut off the battle flag that symbolized the soul of the army. Li Guhong was crazy. He didn't want to live, he only wanted to die - and he wanted to take back the city. Xie Jinchen's betrayal was not treason, but rather risking himself into the abyss just to lure the enemy's main force and give Li Guhong a chance to survive. But Li Guhong didn't understand. He only believed in the oath of blood and fire. When the two broken blades face each other again, one for the city and the other for the situation, who is the true loyal soul?