When the heir of Mistmantle, Princess Catkin, is kidnapped, every corner of the island is searched. A mysterious epidemic begins to ravage the island, and news starts spreading about sightings of the infamous Captain Husk, who everyone believed was dead. The inhabitants of Mistmantle begin to worry that these events are connected and that Husk's reign of evil is about to return. But it turns out that it is Juniper, who later finds out that his father was Husk who tried to kill him. Can Urchin and his trusty friend Juniper recover Catkin before her life is in serious danger?