The narrative begins with a critical lapse in judgment by Bajie, who encounters a figure he believes to be Guan Yin. Unaware that this is actually the demon Red Boy in disguise, Bajie naively seeks help to rescue the Tang Monk. The demon, maintaining his facade, feigns kindness, claiming, "I know Red Boy. He's very nice. I doubt he'll harm the Tang Monk." This manipulation leads Bajie directly into a trap. Upon arriving at Red Boy’s cave, the demon reveals his true colors, sneaks up behind the pig, and throws a sack over him. The demon mocks Bajie, shouting, "I'm not Guan Yin, you fool! I'm Red Boy, and now you're trapped!" This sequence highlights the vulnerability of the protagonists when faced with the demon’s supernatural ability to mimic divine figures.
Back at the camp, Wukong and Wu Jing grow concerned about Bajie’s prolonged absence. While Wukong initially dismisses the pig as "very lazy," he decides to take action. Transforming himself into a bee, Wukong infiltrates the cave, navigating a "long tunnel" until he hears the Tang Monk crying. Upon hearing Bajie’s voice berating the demon for his trickery, Wukong realizes the gravity of the situation. He confirms that "Bajie didn't take a nap after all" and immediately departs to seek the assistance of the real Guan Yin, recognizing that this is a battle beyond simple brute force.
Upon arriving at Guan Yin’s pagoda, Wukong explains the dire circumstances: the Tang Monk is captured, and the demon possesses "magic fire that water can't put out." When Wukong reveals that the demon had the audacity to impersonate the Bodhisattva, Guan Yin’s face burned with anger. This reaction underscores the severity of the demon's offense. In a display of divine power, Guan Yin throws a "Buddhist treasure"—her vase—into the ocean. When Wukong questions this action, he is soon humbled. The vase returns atop a giant turtle, and Guan Yin reveals its new, formidable weight. Despite Wukong using "all of his strength," he finds that "no matter how hard he tried, he couldn't lift the vase at all."
Guan Yin explains that the vase now "holds an ocean's worth of water, magic water," which serves as the perfect counter to Red Boy’s elemental fire. To complete her preparations, she manifests "several swords" that transform into a "large lotus platform." With the necessary tools to extinguish the demon's flames and defeat his trickery, Guan Yin declares, "I have what I need now," signaling the transition from the demon's successful deception to the inevitable divine retribution that awaits Red Boy. The chapter concludes with the anticipation of a decisive battle, as the power of the Bodhisattva aligns to rescue the Tang Monk and punish the hubris of the demon.