Thanks, on tour in Barcelona, the city of cats and artists, is accused of the theft of a rather particular work of art, the unique creation of the great master Salvador. (Dali, of course). Fourmille and Yuri join her and investigate her to innocent her. But while the spirit of a cat sometimes occupies that of Fourmille, who finds himself on the roofs to middle at the moon, the city is worried about the numerous disappearances of young girls. A situation all the more difficult since at the same time, Yuri and Fourmille took in their luggage the preshaun Sigisbert, tied and gagged, to make him confess the secret of the Preshauns... An adventure where Arleston's humor combines with the charm of Barbucci's drawing.