When word about sightings of a sea monster spread, three men embark on a journey to find the creature. But when they get thrown overboard, they soon find themselves in the belly of the beast--the underwater vessel named the Nautilus, manned by Captain Nemo. Having discovered his secret submarine, the sailors are taken as Nemo's captives.

The trio's expedition shifts to an entirely new adventure beneath the vast ocean with giant sea creatures, sunken treasure, and even the lost world of Atlantis. Though the voyage is wondrous, they are still Captain Nemo's prisoners and seek freedom from their mysterious kidnapper.