Dragon Age: The Blood Within

Lyna Mahariel, the Blightender and the Arlessa of Amaranthine, receives a stranger at Vigil's Keep; a Warden who doesn't know she's a Warden. Just who is this woman, and why did seven Grey Wardens from Minrathous come from the Tevinter Imperium to hunt her down? What secrets does a Magister's Vigilus hold to risk war between the Imperium and Amaranthine? (No Inquisition involved)