Firangi starts off with a voice over by the legendary Amitabh Bachchan, who details the settings and atmosphere of the pre-independence era and India's fight for freedom. At the same time, the narrative describes the setting of the quaint little town where the film's lead protagonist Manga (Kapil Sharma) lives. From there on, the film follows Manga's struggle to land a job within the police for the British forces where he fails repeatedly. However, Manga has one special gift; he is able to rectify any spinal ailment with just a kick. This special ability lands Manga the much elusive job with a local British officer Mark Daniel (Edward Sonnenblick). However, unfortunately due to his new job, his marriage proposal to a neighbouring village girl Sargi (Ishita Dutta) gets rejected since he is now classified as a British slave. Making matters worse, the local king, Raja Inderveer Singh (Kumud Mishra) is intent on usurping the village land where Sargi lives, to set up a liquor factory in partnership with Mark Daniel. As part of this plan to usurp the village land, both Raja Inderveer and Mark Daniel come up with a plan to gain the land with rightful consent of the villagers, by tricking them. Manga, whose love also lives in the same village, tries his best to appeal to his master to save the land. However matters go from bad to worse with Manga getting stuck smack in the middle of the unintentional mess. Will Manga save the village land? Will he marry the love of his life Sargi? Or will the British officer Daniel and Raja Inderveer be successful is what forms the rest of the film.