All over the world, Preshauns are dying of shame after suddenly losing their hair. A strange evil that Fourmille must investigate. Common to all the victims - a stay in Abidjan! So Fourmille and Yuri fly to Africa, where they also have to solve the murder of Niele, a famous storyteller from the Ivory Coast, who was murdered because she knew something about the plant that stinks of feet, the very plant that legend has it makes the Preshauns' hair fall out...