S rank hero Ava Cross codenamed Nova retires after her husband Daniel is killed and the Hero Association covets her daughter Lily’s inherited powers. Three years later she hides with Lily in the Haven Shelter founded by Daniel yet gets dragged into the association’s expansion selection. Faced with humiliating rankings dark secrets in the ability development zone and the desperate situation of her kidnapped daughter this down and out single mother crushes all opponents with overwhelming force field powers. She eventually uncovers the shocking conspiracy that the association colludes with the Obsidian Gang to conduct experiments on children and protects kids abandoned by the system alongside her daughter