Zhang Yi has made a deal with the domineering doctor Bai Li. In order to save his sister's life, Zhang Yi is willing to sacrifice everything, his life, his freedom, let alone his body. He is now at Bai Li's mercy. He is a desperate prey who has bee targeted by the predator long time ago. How could he possibly run away? How could he go without his master's permission?

(Source: MangaToon)