Set in 1962, 'Tubelight' tells the story of Laxman and Bharat, two brothers who live in a peculiar village to the north on India. Since Laxman is very naive and humble, Bharat is responsible of protecting him from everything that might hurt him, creating a very deep bond between the two of them.

However, when the tension in the border between China and India reaches critic levels, Bharat will be recruited by the army and will be forced to leave the only family he has left. Laxman, worried about the violence displayed on the conflict, will decide to step in to end it and bring his brother back home.