明朝洪武年间,良材县农官陈忠之女陈细妹(郑希怡饰)继承了亡父的遗志,从小便有锄强扶弱之心,义字当头,成为良材县人见人爱的女护农。大利米店老板谢苍天(夏雨饰)为感激圣上御赐九龙白玉碗,而将其子取名为谢皇上(马浚伟饰)。谢皇上文采风流,自恃聪明绝顶,势要成为良材县为民请命的好官。谢苍天虽唯利是图,但为圆其子心愿,不惜重金捐官,让谢皇上当上了农官,还聘请了发誓不说话的师爷戴从文(黎耀祥饰)和几名恶衙差给他。戴从文才高八斗,料事如神。在他的帮助下,谢皇上屡破奇案,两人惺惺相惜,合作默契,关系更为密切。此后,谢皇上接受戴从文的建议消解了与陈细妹的误会,并聘请她作为女护农。。该剧讲述了一群适龄的年轻人对待婚姻感情的不同态度,和因各种新旧态度的不断碰撞、摩擦,从而引发了一系列啼笑皆非的故事。。While recovering from a severe injury, Wisting receives an anonymous letter. The cryptic content leads Wisting to suspect a possible injustice in an old murder case where a 17-year-old girl was killed, and her ex-boyfriend was convicted。