The opening scene of Shutter Island establishes a sense of mystery and intrigue through its use of codes and conventions. It introduces the two main characters Teddy Daniels and his partner on a boat emerging from dense fog, creating an enigma for the audience about their mission. Teddy is shown to be uneasy from flashbacks and being seasick, in contrast to his partner. Mellow, haunting background music sets a slow, steady pace that gradually builds tension without revealing the plot. Costumes and props of the 1950s era further contextualize the characters and mood. The opening leaves the audience with clues about the setting but no clear answers about what will happen.