Many years ago, the Vikings were seafarers from southern Scandinavia who spoke the Old Norse language. They had trade relations with Northern Europe. This relationship took place in a wide area of ​​northern, central, eastern and western Europe between the late 8th and 11th centuries AD.Between 800 and 1050 AD for three centuries, Viking warriors terrorized Europe with their long ships.Viking explorers ventured into the raging waters of the North Atlantic in search of new lands. Most of them were from Norway.But, at the time of the appearance of dragons, the Vikings were afraid of migration, and when they realized that the rest of the tribes were attacked by dragons while traveling, they decided to build a large village called Berk on the island of Panavari to be safe.A few years after these events, Jungkook, the son of the leader of Berk's people, is born and he is forced to learn to fight like everyone else. Within Burke, education had practical teachings to meet social needs. Girls learned housekeeping and things like brewing, while boys learned swimming, carpentry, metalworking, wrestling, sailing, hunting, shooting, and fencing.

One night, when Jungkook was working in his uncle's blacksmith shop, his younger but more popular cousin entered the blacksmith shop. Jungkook was secretly in love with Taehyung, but he didn't dare to say it. He indifferently hit the metal ax inside the furnace with a hammer and mumbled "I thought you would go to the meeting hall on top of the hill tonight too... you know? My father and your father are explaining the new plan to kill the dragons to our people."