《笑闹无底洞》这部电影讲述了师徒四人在取经路上的奇幻冒险故事。故事中，他们遇见了一心追求阳光的白鼠精，一系列荒诞可笑的情节发生了。师徒们四处探索无底洞，试图解救被困的师父，却意外地卷入了一段前世今生的虐恋故事。

白鼠精，又被称为小白，原本是灵山上的一只小白鼠。因为偷吃佛前的灯油，被贬下凡间。在灵山时，小白得到了如来佛祖的二弟子金蝉子的照顾，对金蝉子怀有深深的思念之情。在凡间，小白一心修炼，希望能早日返回灵山，与金蝉子再次相聚。

而红鼠精，也被称为小红，原本是凡间的一只小红鼠。她与小白结为姐妹，并在小白的引导下一同修炼，最终化为人形。两人相依为命，住在陷空山的无底洞中。

某一天，小白因修炼出了问题，陷入了危机，急需找到至阳之人来补充精气以度过难关。正巧，唐僧师徒经过此地，而唐僧恰好就是那个至阳之人。小白化身为一个落难女子，被唐僧救了起来。同时，小红暗中跟随，计划将唐僧带入无底洞困住。

唐僧醒来后，却面对着小白精心布置的各种诱惑和攻势。然而，唐僧心志坚定，始终不为所动，只想尽快逃离无底洞的束缚。此时，悟空赶到，与小红展开了激烈的对决。在洞内妖气浓重的环境中，悟空逐渐处于下风，最终被迫跳出洞外。

在与唐僧的纠缠中，小白意外地发现了唐僧脖子上与金蝉子一样的痕迹。这一发现让小白兴奋不已，原来唐僧就是金蝉子的转世。然而，唐僧却已经忘记了前世的记忆，小白试图让唐僧回忆起他们之间的前世因缘。

The movie "Laughter in the Bottomless Pit" tells the fantasy adventure story of the four masters and apprentices on the way to learn Buddhist scriptures. In the story, they met a white mouse spirit who was dedicated to pursuing sunshine, and a series of ridiculous plots happened. The masters and apprentices explored the bottomless pit everywhere, trying to rescue the trapped master, but accidentally got involved in a sadomasochism story in the past and present.

White mouse spirit, also known as Xiaobai, was originally a ghost on Lingshan. A small white mouse. Because he ate the lamp oil in front of the Buddha, he was demoted to the mortal world. While in Lingshan, Xiaobai was taken care of by Jin Chanzi, the second disciple of Tathagata Buddha, and he missed Jin Chanzi deeply. In the mortal world, Xiaobai devotes himself to cultivating, hoping to return to Lingshan as soon as possible, and reunite with Jin Chanzi again.

The Red Rat, also known as Little Red, was originally a mortal of a red mouse. She became sisters with Xiaobai, and practiced together under Xiaobai's guidance, and finally turned into a human form. The two depended on each other for life, living in the bottomless cave in the sunken mountain.

One day, Xiaobai fell into a crisis due to a problem in his cultivation, and urgently needed Find the most yang person to replenish the energy to tide over the difficulties. Coincidentally, Tang Seng's master and apprentice passed by here, and Tang Seng happened to be the man of Zhiyang. Xiaobai turned into a woman in distress and was rescued by Tang Seng. At the same time, Xiaohong followed secretly, planning to trap Tang Seng into the bottomless pit.

After Tang Seng woke up, he faced all kinds of things carefully arranged by Xiaobai. Seduction and offensive. However, Tang Seng was determined and remained unmoved. He just wanted to escape from the shackles of the bottomless pit as soon as possible. At this time, Wukong arrived and had a fierce duel with Xiaohong. In the environment full of evil spirits in the cave, Wukong was gradually at a disadvantage and was finally forced to jump out of the cave.

During the entanglement with Tang Seng, Xiaobai accidentally found the The same trace as Jin Chanzi. This discovery made Xiao Bai very excited. It turned out that Tang Seng was the reincarnation of Jin Chanzi. However, Tang Seng has forgotten the memory of his previous life, and Xiaobai tries to make Tang Seng recall the karma between them in the previous life.