In a world swept by a sudden epidemic of superheroes, or 'marvels', Natalie and Hugo, two teens in a small suburban town, have bigger problems. The loss of Sofie Chevalier, Hugo's sister and Natalie's best friend, has plunged both of them into sadness and depression. They also have superpowers. Hugo is gifted with invisibility and Natalie with invulnerability. Together, they must cope with the past and learn what makes superhuman different from superhero.