Growing up, Chu Lan’s grandfather drilled into him that he was not allowed to show his martial arts and superpowers to anyone unless he was in danger. The Sinister Pleasure returns his grandfather’s remains, but not only exposes him to the Outsiders but also implicates his grandfather as the murderer of 10 Outsiders. The Taoist masters of Mount Longhu have a connection with his grandfather, so they send Zhang Ling Yu to bring him back. (Source: frankly at MyDramaList)