Steven Yeun stars in the series as Mark Grayson / Invincible alongside Sandra Oh and J. K. Simmons as Mark's mother and father. Mark Grayson is a seemingly normal teenager whose father Nolan is the most powerful superhero on the planet. Mark is forced to prove that he can be the hero that his father is, unaware that there's a sinister conspiracy going on that threatens the world.
Mark Grayson is a seemingly normal teenager whose father Nolan is the most powerful superhero on the planet. Shortly after his seventeenth birthday, Mark begins to develop powers of his own and learns how to wield them with help from his father.