In Darling In The Franxx, the government has created and controlled multiple humanoid weapon systems that are capable of destroying any life on Earth. However, one day all of the machines attack their creators and force humanity to flee underground. The humans have a single goal - to find a way back up to the surface and fight for survival. Darling In The Franxx is the 26th entry in A-1 Pictures' science fiction horror anime series. The story revolves around Hiro, a young boy who pilots one of the giant humanoid weapons called klaxosaurs and fights for humanity's survival against monstrous creatures known as Klaxosaurs. He leads fellow pilots and partners into battle, but things go south when Hiro starts battling members of his own team.