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.
She's a Humanoid. There's no 
way she'd disobey her master.
إنّها بشريّة آليّة. مُحال أن تعصي
أوامر سيّدها
Wird sie nicht. Als Humanoid muss sie
die Befehle ihres Meisters befolgen.
Es una humanoide.
No desobedecerá las órdenes de su amo.
Es una humanoide.
No desobedecerá las órdenes de su amo.
Une humanoïde est conçue
pour obéir à son maître.
È un'umanoide.
Ela é uma humanoide.
Não vai desobedecer ao mestre dela.
Она ж гуманоид.
Ослушаться хозяина не способна.