In the near future, a Japanese scientist engineers a powered exoskeleton called “Infinite Stratos” (IS). Possessing technology and combat capabilities surpassing those of any other arms system, the IS threatens to destabilize the world. Faced with such an overpowered weapon, the nations of the world enact the “Alaska Treaty”, which states that IS shall never be used for militant combat, and that existing IS technology must be equally distributed to all nations, to prevent any one nation from dominating the others. The introduction of the IS does, however, have a major effect on society. As IS can only be operated by women, there is a shift in the power balance between men and women, where women now dominate society over men.