1914: Milo Thatch, grandson of the great Thaddeus Thatch works in the boiler room of a museum. He knows that Atlantis was real, and he can get there if he has the mysterious Shephards journal, which can guide him to Atlantis. But he needs someone to fund a voyage. His employer thinks he's dotty, and refuses to fund any crazy idea. He returns home to his apartment and finds a woman there. She takes him to Preston B. Whitmore, an old friend of his Grandfathers...