流浪汉赵三发,与查案受伤的大内高手李传卫,因相貌相似偶然互换了身份。李传卫趁机混入反清组织并被委以重任,陈馨儿(赵丽颖)赵三发却入宫成了禅位前后的乾隆皇帝贴身侍卫。没有一丝武功的“低手”赵三发,游走于乾隆、嘉庆与和珅之间。虽然方法不同、地位不同、身份不同,但他们却明暗联手,在紧要关头,帮助嘉庆皇帝除掉了和珅,联手挫败了明教的叛乱阴谋。同时,他们也找回了相隔已久的兄弟亲情,找到了各自的所爱。随着朝野斗争逐渐明朗化,随着李传卫的记忆逐渐恢复,也随着赵三发的越搅越深,他们二人在无意中互相靠拢着。同时,他们渐渐感觉到了对方的存在。当嘉庆皇帝准备大赏功臣的时候,他们却离朝而去,一起去寻找自己亲生父母的坟茔。
The homeless Zhao Sanfa and the injured master Li Chuanwei in the investigation accidentally exchanged identities because of their similar appearances. Li Chuanwei took the opportunity to get involved in the anti-Qing organization and was entrusted with important tasks, but Chen Xiner and Zhao Sanfa entered the palace and became the personal guard of Emperor Qianlong before and after the Zen throne. Zhao Sanfa, the "low hand" without a trace of martial arts, wanders between Qianlong, Jiaqing and Heshen. Although the methods were different, the status was different, and the identity was different, they worked together in secret to help Emperor Jiaqing get rid of Heshen at a critical juncture, and jointly frustrated the Mingjiao rebellion conspiracy. At the same time, they also regained their long-awaited brotherhood and found their love.