By 2010, all men died, one by one izfor critical changes in climate and pollution of unknown. The population dropped to an unprecedented level... until the women were left alone. They live in groups in small corners of the world, for the most part re- nature... There are some women who took their inevitable death and live a carefree life... And there are those,who are trying to continue their race through science... It is a society of constant conflict because of their differences in principles and policies. History happens in the center of Tokyo. This is one of the places left for them. The struggle for a sample of "ice" and the chance that he can give to save mankind begins.