张扬跋扈的富二代肖翔（彭昱畅 饰）因为一次意外而失去记忆，刚好他遭遇了此前发生过龃龉的平凡搓澡工周东海（乔杉 饰）。正在走投无路的东海心生一计，遂骗肖翔是自己的亲弟弟周吉祥，留他在这个有着悠久年代感的大众浴池打工。吉祥懵懵懂懂，虽然倍感蹊跷，却又无从反驳。在进行搓澡工的修炼过程中，他渐渐喜欢上了这门看起来低下卑微的行当，同时原本狂傲的性格也渐渐收到“兄妹”和“奶奶”的影响，变得亲和幽默起来。
一切似乎美好，直到有一天，失落良久的记忆恢复，吉祥才发现，自己一直还是那个不可一世的肖翔……

《万万没想到 第三季》主打“限量”概念，延续天马行空的喜剧风格，并与大电影深度绑定，共同升级万万经典品牌。导演叫兽易小星带领原班人马，继续为网友奉献最火爆的网络迷你喜剧。剧中王大锤也迎来新的挑战，无论是市井小民还是九五之尊，大锤永远都积极应对，收获人生每一个“万万没想到”的结局。限量的剧集，无限的欢乐，尽在《万万没想到》第三季！

此剧是短剧《万万没想到》的贺岁篇，刘备旗下小兵王大锤（白客 饰）和哥哥王小可（马克 饰）春节期间为了回家探亲经历了各种惨况。主公刁难、买不到票，路遇山贼，被姐姐王七哥（戚薇 饰）各种折腾等一系列倒霉的事都被兄弟二人遇到了，虽然王大锤聪明机灵，哥哥有轻微弱智，但是总能化险为夷。
本片有6集，每集都有不同的人物加入，被誉为短剧里的“日和漫画”。

The rigorous city life of China, while bustling and unforgiving, contains the everlasting memories of days past. Three stories told in three different cities, follow the loss of youth and the daunting realization of adulthood. Though reality may seem ever changing, unchangeable are the short-lived moments of one's childhood days. A plentiful bowl of noodles, the beauty of family and the trials of first love endure the inevitable flow of time, as three different characters explore the strength of bonds and the warmth of cherished memories. Within the disorder of the present world, witness these quaint stories recognize the comfort of the past, and attempt to revive the neglected flavors of youth.

A cunning crisis management ploy turns street vendor Zhou Dajiang into the live-streaming partner of top-tier influencer "Little Jasmine" (Xiao Haimo), catapulting him overnight into the new darling of the live-streaming scene. Riding a wave of viral fame with non-stop trends, the story peels back the curtain: what do influencers' real lives look like without beauty filters? What secrets lie hidden in the live-streaming industry, deeper than a black hole? In this "Influencer Adventure" game, the boss battles never end—each challenge more formidable than the last.