Friar Sand, who is well aware that he is not a match for his elder brother, seeks help from the Bodhisattva Guanyin of the Southern Ocean at Mount Potaraka. Here he meets the real Monkey, but the two brothers are at loggerheads. In order to get a clear view of what has happened, Monkey and Friar Sand travel together to the Mountain of Flowers and Fruit to investigate. The two monkeys get into a fierce fight which none of them wins. This brings confusion to the others, who become unable to tell the difference between the real and the fake Monkey. The two monkeys proceed to Mount Potaraka. However, the Bodhisattva can not distinguish between them either, and tells them to go see the Tang Priest.
沙僧自知非大師兄對手，只得到落伽山求南海觀音。在菩薩那裏會到真悟空，弟兄鬧了矛盾。爲了證實具體經過，悟空、悟靜一齊到花果山來看個究竟。兩個猴子大打出 手，不分勝負，但搞亂了大家視線，使衆人不辯真僞。兩個猴子到落伽山，觀音也不能辨別，囑他們去找唐僧。