From the publisher:
Fourmille, Yuri, and Sigisbert are heading to Rome, the eternal city, where the pontiff reigns, the leader of the often pleasant but sometimes monstrous creatures that are the Preshauns. Fourmille hopes to find the answer to an essential question there... What is she doing in Ekho?
She is quickly going to understand that the Preshauns hide a big secret, and that she has become a pawn in a complex political game. Rich in revelations and insights, this is a key volume in the unfolding story of EKHO!