"Sinking into the fire, the Nine-Sky Piano comes out; in today's world, who dares to compete." This is a famous saying that has been circulated in the world for hundreds of years. It is said that the one who obtains Jiuxiao Qin can rule the world and command the world. However, few people know that there is actually a prophecy behind it, which is - "If you go against the will of heaven, you will be in catastrophe; if you want peace, sacrifice your life for the harp." In the process of fighting for this harp, the world fought to the death.