Summer 1954. U.S. Marshal Teddy Daniels has arrived at Shutter Island, home of the Ashecliffe Hospital for the criminally insane. Together with his partner Chuck Aule, he is searching for an escaped murderer named Rachel Solando, while a hurricane approaches. But nothing at Ashecliffe Hospital is as it seems. And Teddy Daniels is not who he appears to be either. Is he there to find a missing patient? Or was he sent to investigate rumors about Ashecliffe's radical approach to psychiatry? The deeper the investigation goes, the more questions arise. How could a barefoot woman escape from a locked room on an island? Who is leaving them clues in the form of cryptic codes? And what is really happening on Ward C? The closer Teddy and Chuck get to the truth, the more elusive it becomes, and the more they begin to believe that they may never leave Shutter Island. Because someone is trying to drive them insane...