From the publisher:

Ekho is a mirror world to the earth. It has developed like her, but electricity doesn't exist; here magic reigns. On Ekho you'll recognize the usual continents, cultures, and cities. Paris, New York, London, Barcelona... they're similar yet very different. One travels on the backs of dragons or caterpillars. This series reinvents the contemporary world in a heroic fantasy version, magnificently illustrated by Alessandro Barbucci.

Across the planet, Preshauns are dying of shame after suddenly losing their hair. A strange evil that Fourmille must investigate. What all the victims have in common: a stay in Abidjan. So it is to Africa that Yuri and Fourmille fly, who must also solve the murder of Niele, a famous Ivorian storyteller...

resume:

À travers la planète entière, des Preshauns meurent de honte après avoir brusquement perdu leurs poils. Un mal étrange sur lequel Fourmille doit enquêter. Point commun de toutes le victimes : un séjour à Abidjan. C'est donc vers l'Afrique que s'envolent Yuri et Fourmille, qui doit également résoudre le meurtre de Niele, célèbre conteuse ivoirienne, assassinée car elle savait des choses sur la plante-qui-pue-des-pieds, celle-là même qui ferait tomber les poils des Preshauns...