The WSO has learned that the Gravity Curtain has reached an unstable status and will explode within 66 hours, destroying all of Earth and human life itself. Each of the three factions controls a part of the mechanism responsible for the Gravity Curtain's operation. Knowing the danger of disabling the Gravity Curtain and combating the various factions, the WSO decides to send the Skull Force. The Skull Force is divided into two squadrons - one of which is the 2 member-only Death Caprice Squad, composed of Ken Kaidou and Ryou Magami, pilots of the Mazinger called Mazinkaizer SKL.