KaiNagisa,anormalhighschoolgirlwhowishestoonedaybecomeaprofessionalwrestler,issuddenlyapproachedbyarobotknownasanIczel.IczelurgeshertohelpsavetheEarthfrominvadingalienscalledGeas.TheGeas,ledbyChaosandCross,arebentonstrippingEarth'
sresourcesandthendestroyingit.Tofighttheinvaders,NagisamustmergewithIczelandbecomea...