With courage and ingenuity, Phileas Fogg has earned the respect and friendship of the enigmatic Captain Nemo and completed his search for Professor Aronnax. However, an almost unbelievable discovery keeps him aboard the submarine Nautilus: the crew stumbles upon the remains of the legendary city of Atlantis on the ocean floor. Together with Nemo and Aronnax, Phileas Fogg ventures into the ruins, where the adventurers encounter sunken treasures, enchanted palaces, and unspeakable horrors. Meanwhile, the greatest danger is brewing aboard the Nautilus: is there really a traitor hiding there?.