Professor Layton and the Eternal Diva (Eiga Reiton-kyoju to eien no utahime)
Professor Layton and his assistant, Luke, remember their original case together: a famous singer asked for help after meeting a little girl who claimed to have eternal life. While attending an opera performance, the entire audience is locked inside a building turned into a ship by a mysterious man. They are forced to solve a dangerous puzzle—the prize is the secret of immortality, but failure means death. Can Layton uncover the truth before it's too late?