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Welcome to Burke Island, the island where dragons and Vikings live side by side in peace and harmony! Hiccup has fulfilled his long-held dream and created the world's first "dragon-viking utopia" - a place where humans and dragons live together. But a cruel enemy, the dragon hunter Hrymchak, stands in the way of the friends. The villain is doing everything he can to get hold of the Night Fury. To defend their home and their friend, the brave Hiccup and his faithful dragon Toothless set off on a journey.