Zhang Kaichen is a warden, a warden who can dominate the prison with one hand.
A new prisoner with a mysterious identity arrives and is connected to hell by mistake.
Like the water, one can see another world, a place more terrifying than prison.
Through the "water surface", Zhang Kaichen saw a man, holding a big sword in his hand, motionless, but when he looked at him, he looked at the "water surface".