Lalon Fakir (? - 1890), a doyen among the Baul-Fakirs of Bengal, composed few hundred songs of profound spiritual depth and an excellent sense of music. Buddhist Tantricism, Hindu Vaisnavism and Islamic Sufism all have their shares of influence on Lalon. Throughout the decades Lalon's songs, depicting asceticism and transience of life, have expressed the pathos and pangs of the caste-ridden subaltern rural populace of Bengal. Lalon's secular ideas and enchanting lyrics left deep influence on the subsequent generations of the different trends of Baul-Fakirs of Bangladesh and India. Though Lalon died only a hundred years ago yet not much details of his life is clearly known and some aspects are still shrouded in mystery. By portraying the milieu of Lalon who was a kind of a Guru during his life-time, the film aims to catch the social ethos of his period. Some historical personalities, who were prominent in the cultural history of Bengal of that time and came in touch with Lalon, like Jyotirindranath Tagore, Kangal Harinath and Mir Mosharraf Hossain, also figure in the film. The film tries to portray Lalon's life, persona and ideas mainly through the lyrics of his songs.