Mark Grayson is a normal high school senior with a normal part-time job whose father, Nolan Grayson, is the alien (but human-appearing) Omni-Man, the most powerful superhero on the planet. At age 17, Mark begins to display superpowers, which come from his father being a member of the Viltrumite race, who, according to Nolan, pioneer the galaxy on a mission of benevolence and enlightenment.
