The Peerless Prison Doctor

Five years ago, his sister took her own life after being humiliated. His limbs were crippled, and he was thrown into the river. Rescued, he became the heir to a mysterious power, guarding the Northern Frontier as a prison doctor and keeping a million kingpins locked away! Only when his master pressured him to continue the family line did he finally leave prison. From that day on, the entire world was set ablaze by his arrival!