Red Boy kidnaps the Tang Priest. The three brothers find out where the demon is living, and that Red Boy is the son of Bull Demon King. Monkey is confident that he and Bull Demon King still are friends, so he tries to appeal to Red Boy’s affection and rescue his master. However, the demon refuses, and defeats Monkey with the True Samadhi Fire.
紅孩兒攝走唐僧，弟兄三人得知妖怪的住所也探聽到紅孩兒是牛魔王的兒子。孫悟空自信與牛魔王是故交，向紅孩兒敘情誼，欲救師父。妖怪不認舊誼，用三昧真火敗走悟空。