Gao Yi, a suona player in a folk orchestra, is a notorious "thrifty angel" whose entire life is built around extreme penny-pinching. Driven by pure greed, he agrees to temporarily look after a four-year-old boy named Awu for a quick 300 yuan. However, things take an unexpected turn when the boy's mother suddenly disappears without a trace, forcing the stingy bachelor and the toddler into becoming a makeshift father-and-son duo. Meanwhile, Gao Yi falls head over heels for a beautiful cellist named Wen Lan, launching an absurdly cheap and stingy courtship. Through a series of hilarious yet touching misadventures, Gao Yi's rigid principles regarding money and life begin to fundamentally change.

本片讲述了美食主播意外穿越来到唐朝，凭借自己超越朝代的特色厨技，携手隐藏身份的帮派少主以及流落街头的富家公子，在一起开办了风靡长安的酒楼后，共同品尝生活滋味并实现美好爱情的故事。

清朝顺治十八年，天花在皇宫蔓延，顺治帝的董爱妃因此一命呜呼，顺治因痛不欲生而决意出家。此时，清帝国充满了内隐外忧。危急之际，孝庄太后（斯琴高娃 饰）当机立断，将得了天花初愈的年仅八岁的皇子玄烨力推为皇室继承人，康熙皇帝登基了。康熙（陈道明 饰）即位以后，手握兵权的鳌拜以权相逼，孝庄太后为了大局也只好暂时放权让鳌拜亲政。鳌拜的野心并不止亲政，他最终目标是图谋改朝换代，少年康熙机智过人，先以终日和一班少年嬉戏放松鳌拜警惕，随后邀约鳌拜进宫而乘机将其软禁，终于为大清除了一大隐患，保住了江山。随后，康熙更是励精图治，向隐忧以久的三藩开刀，开始一段除乱安内的康熙之治！