The "Himawari So" ("Sunflower House") is a group home for mentally underdeveloped adults. Manga artist Itpon Aijo (Naoto Takenaka) begins to work at the "Himawari So". He moves into the home with his daughter Mako (Shihori Kanjiya), who is mentally underdeveloped. Uyan (Takayuki Takuma) is a resident at the group home. Uyan and Mako begin to develop feelings for each, but Itpon becomes worried about them.
When the White House (Secret Service Code: "Olympus") is captured by a terrorist mastermind and the President is kidnapped, disgraced former Presidential guard Mike Banning finds himself trapped within the building.
Life for former United Nations investigator Gerry Lane and his family seems content. Suddenly, the world is plagued by a mysterious infection turning whole human populations into rampaging mindless zombies.
When the crew of the Enterprise is called back home, they find an unstoppable force of terror from within their own organization has detonated the fleet and everything it stands for, leaving our world in a state of crisis.