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 deepens, Oskar discovers the dark secrets of Eli's existence. The film beautifully captures the loneliness and vulnerability of its characters, while also exploring themes of love, friendship, and the nature of evil. Let the Right One In is a haunting and atmospheric film that has received critical acclaim for its unique take on the vampire genre.