From the introductory section:
The Dalish Curse is a Dragon Age adventure, designed for a group of characters just starting to make their way in the land of Thedas. It originally apppeared in the Dragon Age Set 1 boxed set, and we’re proud to present an update version of it here.
You can play The Dalish Curse as a stand-alone adventure or
as the start of a full-fledged Dragon Age campaign.
The Dalish Curse was originally in Dragon Age RPG Set 1, and is the most-played adventure for the game. Set 1 is out of print, and the adventure doesn't appear elsewhere, so we've released it as a free download.