The Great Chase. Sissi is on the run again! This time she goes to Venice to search for the island where her father is being held prisoner. In their luggage: Chancellor Zottornik's map, which shows the exact coordinates. In the meantime, Zottornik does everything to stop Sissi. Under no circumstances must Duke Max be freed! At the Italian border, he ordered his people to stop the train by telegraph. In addition, Count Arkas is sent behind Sissi. Arkas follows in an airship.