Across the entire planet, Preshauns die of shame after having suddenly lost their hairs. A strange evil on which Fourmille must investigate. Common point of all the victims: a stay in Abidjan. It is therefore to Africa that Yuri and Fourmille fly, who must also solve the murder of Niele, famous Ivorian storyteller, murdered because she knew things about the plant-who-pue-foots, the same one that would bring down the hairs of the Preshauns...