Shutter Island (2010), directed by Martin Scorsese, is a psychological thriller that blurs the line between truth and madness. Leonardo DiCaprio plays U.S. Marshal Teddy Daniels, investigating a disappearance at a remote mental institution. As the mystery deepens, reality begins to unravel into haunting dreams, trauma, and deception. The film is a masterclass in suspense, with a twist that redefines everything before it. Dark, atmospheric, and unforgettable—Shutter Island is a puzzle of the mind and soul.