The small town of Beaver Mills in Alaska, USA, is quiet and elegant, surrounded by green mountains and clear waters. The people here live a comfortable and peaceful life. They are about to usher in the happiest moment of summer - the polar day, which is an annual happy festival in the town. But before that, strange events kept happening, such as the mysterious disappearance of the old man fishing, the appearance of the caribou corpse, and the empty and blood-stained car. It turned out that a terrifying snake dragon appeared in the lake next to the town. This prehistoric animal that should have been extinct came back to life from the extreme cold and kept attacking humans. The originally happy festival became full of panic, and people were forced to stay in the house. But this can't solve everything. The people in the town tried every means to fight back against this monster... The snake dragon, a dragon in Western mythology and legend, usually has two legs, two claws and a pair of wings. It can spit fire at the enemy and often appears as an evil villain in legends.