At the end of the previous volume, we had left Gnondpom and Tyneth, the two little trolls, in a very unfortunate posture, in the process of drowning... We find them damp and on the way to education, since Lady Romande did not give up making educated trolls. Fortunately, Waha, Pröfy and Tetram will come to their rescue, while they are about to be sold as slaves in a terrible factory... Volumes 12 and 13 form a complete story.