After witnessing the brutal murder of his family, a lady takes him in and gives him a new life, following four rules he must absolutely obey. One, never speak about his old identity, two, never hurt anyone and follow his family’s footsteps, three, do not mess with the people who killed his family, four, pay for his family’s sins— work under the lady as an apprentice and make medicine. These rules dictated his life—followed obediently for years without question. But just where does the line blur?