Danger is everywhere in the forest, from not only animals, but humans. Gangsters hid in the dark and attack passers with impunity. To protect villagers, two warriors, Mullergo and Gosha, disguised as trade caravan and went deep into the dense forest to find traces of these gangsters. Unfortunately, they were ambushed and Gosha was killed on their way. Goron, the naughty son of Mullergo, hid in the basket of his father and witnessed the incident, and finally he understood what the "danger" means that adults always talk about. He decided to help his father to pull off the task of arresting these gangsters. When continuing their journey, they arrived at a caravansary named Black Gem in the depths of the forest where they decided to stay overnight. But the night was still unsettled……