The people of Japan continue to fear an impending apocalypse, which they believe may be caused by the actions of mankind. In the corrupt world of Japan, five beautiful women soon appear, as if sent down from heaven.

Events unfold in the near future. The main character, Tina Owen, was released from prison after a 2000-year sentence. In exchange for a pardon, she has to join the Omega 13 research group, which is engaged in the study of the eponymous planetary system.