"Professor Layton and the Eternal Diva" is an animated film based on the popular video game series Professor Layton. The story follows the brilliant archaeologist Professor Hershel Layton and his apprentice Luke Triton as they investigate a mysterious opera performance that leads to a series of puzzling events. The film features a blend of adventure and mystery, showcasing the characters' problem-solving skills through various puzzles. As they delve deeper into the plot, they encounter the enigmatic Melina Whistler, who holds the key to a dark secret that could change everything.