The trailer introduces the psychological thriller film Shutter Island, set in 1954. It shows U.S. Marshal Teddy Daniels investigating the disappearance of a patient from the Ashecliffe Hospital on Shutter Island. Teddy begins to doubt his own memory and sanity as he discovers more puzzling clues and secrets about the hospital's radical treatments. Visual codes establish the period setting through costumes. Technical codes use shots that build tension, like close-ups of patients' fearful faces. As a hurricane isolates the island, Teddy questions everything around him on the mysterious island asylum.