Crossing over to become Zhu Peiqi, a low-level little pig demon of Langdang Mountain, he accidentally obtained the chance of longevity. After the original lion demon king was slaughtered by the scripture-seeking team, Zhu Peiqi led the little demons to establish Fierce Pig Mountain. While running around for food, everyone resisted the surrounding evil demons and demon catchers entering the mountain, rescued Qing Yan, a Qingqiu fox demon, and was successively involved in various disputes. Witnessing the tragic death of the black wolf who rebelled against the heavenly gods and seeing through the situation of the demon clan being at the mercy of others, the little pig demon, who originally only wanted to live a stable life, happened to meet a high-ranking person from the Northern Emperor Sect to learn thunder magic, went through numerous hardships, rose step by step, commanded all demons, and reached the top as the Langlang Mountain Demon Emperor.