This action-filled, deep-sea animated adventure, follows the inexperienced young explorer Milo James Thatch who is desperate to complete the quest begun by his late grandfather in finding Atlantis. Thatch tries to convince his friends that he knows the whereabouts of Atlantis without success until eccentric billionaire, 'Preston B Whitmore' agrees to fund an expedition to find the legendary lost empire. As the linguistics expert, Milo, guides the team, headed by Commander Rourke, to the elusive undersea kingdom of Atlantis. But what they find there defies their expectations and triggers an explosive series of events that only Milo can resolve.