The film opens with the elderly Ravi (Soumitra Chatterjee) driving to an abandoned carpet factory in West Bengal. As he explores the remains of the factory, he finds his bed and other memoirs. The story flashbacks to the early 1940s in British Raj, with Ravi Gupta (Sikandar Agarwal) a child laborer in the factory, saving up his earnings so that he can leave the factory one day. Ravi befriends a girl of his own age, Masha (Tumpa Das), who's been sold to the factory by her father. When the obstinate factory manager (Biplab Dasgupta) tries to sell Masha to a rich man, Ravi unsuccessfully tries to match the bid. He subsequently gives her the money to escape, and as they part Masha promises to wait for Ravi at every full moon at Calcutta's great Kali temple.