To access the new areas (not applicable if you are playing the expansion standalone), go to Mithria harbor and talk to captain Hanty, then select 'The Quest Isle' as your travel destination.
You'll need all your wits and gaming talents as you travel through these deceptively picturesque worlds to overcome new challenges, for good or evil. In the game you are a Kingdom Agent on special assignment to discover the source of a mysterious illness that has devastated one island (icy Thule) and threatens another (fiery Eldfell). However, if you don't have The Quest, you can also play the expansion as a standalone game.
After enabling the expansion, you can continue to play The Quest with your existing character(s) to explore new areas and quests. The Quest - Islands of Ice and Fire is an expansion to The Quest, a beautifully handdrawn, engaging and sinister world full of mystery, magic and provocative challenges.