Ou Xiaonuo, the descendant of the Spring and Autumn period sword-making master Ou Yezi - a funny and beautiful girl, was playing a sword game on her mobile phone one day, but traveled to the Spring and Autumn period and the Warring States period, where she ran into a ferocious monster. Fortunately, she was saved by a swordsman... The monsters that came from the time and space rifts, led by ancient demons, wanted to seize the sword souls forged by Ou Yezi and turn the world into hell. After experiencing love and hatred, the souls of the nine famous swords finally awakened and formed a sword alliance headed by Zhanlu, the number one sword in the Warring States period, to defend the world.