Supreme Heavenly Doctor

In the midst of a bustling metropolis, the appearance of a single person could stir up a storm. Six years ago, he left without a trace; six years later, he returned, and the world was transformed. He was the one job that the world's top organization dared not accept; he was also the most inconspicuous person in the bustling world. The three things he did most in his life were: Kill people! Save people! And redeem people!