Thorgal: The Selkie (Thorgal #30)

Thorgal's daughter Wolfcub wakes up inside a cage in a fisherman's hut, after being abducted. She sees only a strange-looking woman, a mute little girl, and a young boy terrified of his father, the kidnapper. And none of them are willing to free her... Meanwhile, Thorgal and Jolan are already on her trail, but to find her, they will have to brave the curse of the Selkie - the seal woman.