東京マグニチュード8.0 - 夏休みに入ったばかりのお台場。
中学1年生の未来は、弟の悠貴に付き合わされロボット展を見に来ていた。
はしゃぐ弟を横目に、反抗期真っ盛りの未来は退屈そうにケータイをいじっている。
「毎日毎日ヤなことばっかり…。いっそのこと、こんな世界、壊れちゃえばいいのに」
そう思った瞬間、突然地面が激しく揺れた。
東京を襲った、マグニチュード8.0の海溝型大地震。
連絡橋は崩れ落ち、東京タワーは倒壊―。一瞬にしてすべてが変わった東京。
未来は悠貴の手をひき、お台場で出会ったバイク便ライダー・真理の力を借りながら
世田谷にある自宅へ向かう。
果たして3人は無事に家に帰ることができるのか―。
Tokyo Magnitude 8.0 - Middle school student Mirai Onozawa is dissatisfied with her family circumstances and, in a moment of frustration, wishes to tear everything apart. Unfortunately, these destructive thoughts seem to come true in the form of a magnitude 8.0 earthquake just a few moments later.
When summer vacation begins, Mirai reluctantly takes her younger brother Yuuki to Odaiba, where a robot exhibition that he wanted to go to is being held. However, while they are in the exhibition center, the fury of a major earthquake shakes the Kanto region; helpless, both kids witness the devastating power of this natural disaster as it brings the city to its knees.
In its aftermath, they stumble upon Mari Kusakabe, a motorcyclist and single mother who decides to help the young siblings. Aiming to return to their homes and reunite with their families, the group sets off on a long and hard journey through the decimated city.