When the Nautilus docks on an island to reestablish supplies, Nadia bonds with Grandis when the latter tells her how the first man she fell in love with turned out to be a treacherous cad.

Trapped inside a mysterious chamber, Nadia learns from a disembodied voice that their island home is actually a space satellite, Red Noah--and that she is the heir to the throne of Atlantis as well as not human! Tremors engulf the island as Grandis and the others prepare to set off, but Jean returns to save Nadia.

All the pieces fall into place for the final stage of Jean and Nadia's journey around the world, Nemo and Gargoyle's long-standing feud, and the secret behind Nadia's Blue Water pendant.

I won't tell you how it ends....