A deadly typhoon, a mysterious creature, and a girl who won't give up. In 2020, a giant creature devastates Tokyo, leaving ruins behind. In 1959, Asa Asada, a spirited young girl from a large family in Nagoya, is kidnapped for ransom, and no one notices. When a typhoon strikes Nagoya, Asa and her kidnapper are forced to collaborate to survive. However, there is more behind her kidnapper and this storm than meets the eye. Asa and Nakaito take to the skies to take a closer look at the mysterious creature that has appeared off the coast of Japan. As the creature threatens them with its sharp teeth and spiked tail, Nakaito tries to decode his mentor's notes to find its weakness. However, their attempts to neutralize the beast fail when it heads toward the shore!