From publisher blurb:
Living in a world filled with super-powered individuals can prove challenging, especially for the younger generations. Superheroes and supervillains have become part of everyday life, and young people growing up today have learned to accept these facts. Indeed, a great many teenagers and adolescents dream of what they’d do if they had special powers and what those powers might be. Most of them, of course, never acquire powers and never have to deal with the risks or responsibilities such powers bring with them.
Some young folks, however, find themselves thrust into the super-powered world whether they wish it or not. In many cases, an adolescent manifest their powers when they reach their teenage years. They must deal with the normal challenges of those awkward years while at the same time trying to understand these newfound abilities. Their friends and family often find such a transition difficult at best and dangerous at worst.
This PDF contains everything you need to know about Onyx & Rebelle, in the Amazing Universe Campaign or any other superhero campaign.