Jolan has become a robust kid who is interested in everything. The strange signs he draws without knowing their meaning thoroughly intrigue his parents. During one escapade, he makes friends with a boy his age. The child seems to be lost. Along with being deaf and mute, he cannot answer questions raised by his mysterious presence.
Kriss de Valnor, the deadly warrior-woman and Thorgal's arch enemy, has Thorgal's and Aaricia's son abducted. She demands that Thorgal and Aaricia go on a quest to find the magical mask if they want to save their son.