When Mark Tingen a 23 year old man, a seemingly ordinary individual from Earth, transmigrates into the body of 17-year-old Leon Pentance in the Marvel universe, his life takes an extraordinary turn. Awakening to newfound powers as a Sequence 9 Apprentice from "Lord of the Mysteries,". However, his new life as a budding adult is far from typical as he grapples with removing certain people from the picture and maintaining his social life, while harboring the secrets of a mysticism.