During the technological advancements of 1889, a menacing figure called Gargoyle emerges, fixated on reviving the ancient Atlantean realm's splendor. Nadia, alongside the youthful inventor Jean Raltique and the enigmatic Captain Nemo aboard the Nautilus submarine, embarks on a perilous mission to thwart Gargoyle and his Neo-Atlantis forces, striving to protect the world from their sinister ambitions. Inspired by Jules Verne's '20,000 Leagues Under the Sea'.