Sun Thief, a young man from a mountain village, suffered humiliation because of his name and origin, and he depended on his grandmother for life. In the predicament of being bullied by the village bully and misunderstood by the whole village, he practiced self-defense skills under his apprenticeship, studied hard, and used his fists and wisdom to clear his name. Faced with his father's sudden return and the frame-up from his fellow villagers, he tempered and grew up through repeated tests. In the end, he untied the knot with his father, took his family out of the mountains, and started a new life.