Many years ago, on one secluded island, representatives of two clans settled at once. The vikings who arrived there quickly built a settlement, enjoying the natural treasures of a new homeland. However, it soon became clear that life here would not be the calmest. First owners of the island, the dragons, started to harm the people who settled there. The son of the Viking leader, who is the main character in How to Train Your Dragon The Hidden World Ultra HD, managed to stop the prolonged feud. The boy befriended a cute dragon. Their adventures together have made it possible to reconcile the warring clans. Now people and dragons live peacefully, dividing the island between them without conflict. The leader's son has grown considerably since then. His faithful friend has also grown up. The sweet dragon will soon find his love. He will meet a charming member of his clan who he will fall in love with. Meanwhile, the island and all its inhabitants will be in mortal danger. A cruel hunter for rare dragons has docked at the shore...