A large monster attacks Japan, but dies suddenly. It's only a matter of time that a gas explosion will take place from the carcass of the monster, which could cause the country to collapse. Arata Tatewaki is assigned to lead a special force team into the critical area. Yukino Amane appears in front of Arata Tatewaki . She is the secretary to the environment minister and also the ex-fiancee of Arata Tatewaki.