In the near future, much of the world has been forgotten at the bottom of the ocean due to rising sea levels. Natsuki Ikaruga, who lives in a small town surrounded and stranded by the sea, is invited by a mysterious woman, Catherine, to search for a treasure in his grandmother's house who was a marine geologist. One day, he dives to the bottom of the ocean in a submarine and encounters a mysterious capsule with a girl sleeping inside. The girl was a humanoid so sophisticated that she could be mistaken for a human.
No... No...
...لا... لا
Ich will das nicht! Nein!
No. ¡No!
No. ¡No!
J’en ai assez ! Je veux sortir !
Non voglio!
Não... Não...
Нет! Не хочу!