"Atlantis: The Lost Empire" is an animated adventure film that follows the journey of Milo Thatch, a young linguist and cartographer who is determined to find the legendary lost city of Atlantis. When he discovers an ancient journal that holds the key to locating the fabled civilization, Milo embarks on an expedition funded by a wealthy benefactor. Accompanied by a diverse crew, including a tough mercenary and a spirited mechanic, they navigate treacherous waters and face various challenges. Upon reaching Atlantis, Milo uncovers not only the wonders of the advanced civilization but also its dark secrets. As he grapples with the moral implications of their discoveries, he must decide whether to protect the Atlanteans or exploit their resources for personal gain. The film combines elements of action, fantasy, and mythology, ultimately exploring themes of friendship, loyalty, and the importance of preserving history.