For trying to reveal his brother's felony, Libellula is forced to leave Castel Nuit-Safran. Augusta now reigns as master and is about to deliver the ancestral castle to Roq Blême, the age-old enemy. With the help of the faithful Titan and the spectrum Albumen, Libellula must find a way to save the barony of this outside enemy, but also more ghosts every day! The unexpected help of a troll ghost will be decisive and the most legendary of battles is about to begin...