Emma Payson knew her life and the life of Sam, her younger autistic brother, would never be the same after they were taken in by the reclusive vigilante Phoenix. But when her quest to become a hero uncovers a sinister plot hatched by Phoenix's supposed best friend, Walter Nathaniels, she can't tell if it was a change for worse or for better. Along with a cyborg, an alien from another dimension, a teenage witch, a street fighter, a prince from an underwater realm, and two former experiments, Emma and Sam go on the run, desperate to find proof of Nathaniels' wrongdoings. If the adults don't trust them, all they can trust is each other.