The opening sequence of Shutter Island establishes the film's themes of mystery and imprisonment through its visuals and audio. It begins with text over a black screen accompanied by unsettling string music. The camera then reveals a ship emerging through dense fog, hinting at uncertainty and suspense. On board the ship, a character is seen being sick near chains, suggesting the story will involve prisoners. The main character Teddy is then introduced in a bathroom, appearing unwell. Later scenes feature chains, handcuffs and muted colors that connote jail. Teddy and another character talk on the deck, establishing them as counterparts. A flashback reveals Teddy's wife may be dead, supported by her bare feet and red nails. The opening