This is the story of the famous friend of the legendary detective. A year after the death of his friend and partner Sherlock Holmes at the hands of Moriarty, Dr. John Watson returns to medicine as the chief physician of a clinic specializing in the treatment of poorly understood diseases. But Watson's previous life is not over - Moriarty and Watson will write their own chapter. In this story, the focus shifts from solving crimes to searching for the solution to the mystery of a disease capable of destroying human life.