Jack and his crew were sailing over sea on the black pearl as they suddenly came into a thick fog near a forgotten island, the island was tropical but got a uneasy aura, so they stayed on the ship as Will Turner walked up to Jack Sparrow

Will: „Jack… I got a bad feeling about this“

Jack: „Yeah… fog can be cold get yourself a blanket“

Will: „No not that… something dangerous is in the fog hiding…“