Shutter Island 

Shutter Island is an American thriller directed by Martin Scorsese, featuring a prominent cast that includes Leonardo DiCaprio, Mark Ruffalo, and Ben Kingsley. The film is set in the 1950s and follows U.S. Marshal Teddy Daniels, played by DiCaprio, who is sent to a remote island to investigate the disappearance of a patient from a mental institution. The narrative unfolds as Daniels and his partner, Chuck Aule, portrayed by Ruffalo, delve deeper into the mysteries surrounding the institution, uncovering unsettling truths about the patients and the facility itself. The film is based on the novel of the same name by Dennis Lehane, which adds a layer of psychological complexity to the storyline, exploring themes of trauma, guilt, and the nature of reality.