He had heard what happened at the castle. There were women who had come back, their eyes hollow, their bodies broken from birthing children who might have some usable magic, the Halbrasse, the half-breeds.
Back then, a woman had stepped from the shadows. "I know what happened to your sister, but you can't stop them now. You will only die in your quest. There will only be more women taken, more children sacrificed. But if you stay, you have a chance to change things. Your father trusts you. You can be the eyes and ears of the Resistance inside his camp. If you hear of a raid, we can get there before you. If you hear of who will be targeted for sacrifice, we can spirit them away. And in time, we will help you save your sister."