Thousands of years ago, the Monkey King defeated the Golden Winged Dapeng while escorting Xuanzang to the West to obtain Buddhist scriptures. Thousands of years later, Sun Xiaosheng inherited Sun Wukong's ambition to punish evil and promote good, and embarked on the road of killing demons and monsters with his brother Wuming. However, after thousands of years of grudges and fate, the good brother Wuming turned out to be the evil Jin Xiaopeng. The two went from being life and death partners to facing each other with swords, ushering in a battle of cause and effect.