Let the Right One In is a Swedish horror film directed by Tomas Alfredson. The story revolves around a young boy named Oskar, who befriends a mysterious girl named Eli, who turns out to be a vampire. As their friendship grows, Oskar discovers the dark secrets of Eli's existence. The film explores themes of love, friendship, and the blurred lines between good and evil. Let the Right One In is a critically acclaimed movie that combines elements of horror, drama, and romance to create a unique and thought-provoking cinematic experience.