The order of Roland, lord of the land of Ile-Rien, was clear: Captain Thomas Boniface must arrest the black magician Grandier. But Grandier disappears without a trace - and in his house, Thomas discovers the wizard Dubell, imprisoned in a magic crystal, who once taught the secrets of his art to Princess Cadet. But was it not Grandier who took the form of Dubell in order to destroy the protective spells protecting the peace of Il-Rien? Was it not Grandier, who desired absolute power, summoned from the abyss of Hell a monstrous force - the Horde of black wickedness? The fate of the whole world hangs in the balance - and depends on the fearless Thomas and young Kade.