A cruel game that controls the fate of countless people. They once agreed to work together, but they secretly have their own unknown secrets. The girl with a smile like a flower, what kind of evil intentions are hidden under her beautiful face, and the gentle and silent boy points the poison-soaked sword at someone. Under the seemingly clear sky, a dark conspiracy is brewing. Will the bottomless whirlpool swallow up all the light? Commitment and love, what do they mean to them? The game has begun, and the black hand behind the scenes has quietly rested on the head of an innocent life. Can the red blood redeem people's demonic souls?