During the Revolution of 1821 in the Aegean, pirates and slave traders spread terror. Among them is the Greek Nikolaos Starkos, who shamelessly collaborates with the occupiers. Only his mother dares to resist him, the fiery warrior Androniki, who fights in the struggle against the Turks. At the same time in Corfu, the wealthy banker Elitsutdo is preparing to marry off his daughter Hadjin to the French philhellene Henri d'Albaret. When the marriage is canceled, Henri, disappointed, leaves the island and, as captain of the corvette Syphanta, searches the entire Aegean for the mysterious pirate Sakratif. What is Nikolaos Starkos's connection to Sakratif? Will Hadjin manage to escape from the pirates? Jules Verne's love for Greece's just struggle for independence is highlighted in this important work, instilling values in children such as patriotism, selflessness, and faith in friendship.