Thorgal's daughter Wolfcub wakes up inside a cage, in a fisherman's hut, after being abducted. A strange-looking woman, a mute little girl, her pet lobster and a young boy terrified of his father – the kidnapper – are the only people there, 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.