Ginga Tetsudou 999, also known as Galaxy Express 999, is a classic anime series set in a futuristic universe where humans can transfer their minds into mechanical bodies. The story follows a young boy named Tetsurou Hoshino and a mysterious woman named Maetel as they travel aboard the Galaxy Express 999, seeking a planet where he can obtain a mechanical body for free. This iconic series explores themes of humanity, technology, and the quest for immortality.