(Released: Jun 23, 2017)
In a small town called Jagatpur in Kumaon, Laxman Singh Bisht (Salman Khan), a slow-witted person grows up under the able protection of his loving and caring younger brother Bharat Singh Bisht (Sohail Khan). While others tease Laxman, bully him and call him Tubelight, Bharat shuts them up and protects his brother whenever needed.
Everything was going fine till suddenly a war breaks out - The Sino-Indian war of 1962. Bharat and other youngsters from the town join the Indian army and go to the front to fight. Laxman also tries to join the army but fails the physical test and hence he stays back at home. This leaves Laxman alone, who is innocent, vulnerable and unable to protect himself.
An Indian woman of Chinese origin Lee Ling (Zhu Zhu) comes from Calcutta to stay there with her little son Guwo (Matin Ray Tangu). While Laxman hates them at first, he is forced to follow the Gandhian principle of befriending who you consider your enemy by Banne Chacha (Om Puri). That's how Lee and Guwo turn Laxman's only friends in a place where others were mostly unkind in their approach towards him or simply ignore his antics.
Laxman keeps asking the army chief posted there, Major Rajveer Tokas (Yashpal Sharma) when will his brother return from war to which he cannot offer a suitable reply. While others fear Bharat is dead by now, Laxman's faith keeps him going. Banne Chacha tells him that faith can even move mountains, which Laxman takes very literally and tries to do that. At the same time, he keeps believing that his brother, who has been captured by the Chinese army, will return from the front and declares that he will get Bharat back with his 'yakeen'.