Northern India, 1986. Guddu and his younger brother Saroo help out their impoverished family by scavenging anything they can. One night Guddu and Saroo are separated at a train station. Saroo tries to find Guddu but ends up on a train that takes him to Calcutta, 1,600 kms away. In Calcutta he is taken in by a organisation that finds adoptive parents for orphans and lost kids. Saroo is adopted by an Australian couple, the Brierleys, and moves to Hobart, Tasmania. 20 years later he decides to find his mother and brother.—grantss