When young Nathan is separated from his mother while serving on an overseas rescue mission, he runs away from home only to find shelter at a local orphanage. There his incredible talent at the piano is revealed and he becomes the star attraction at a benefit concert to raise money for the orphanage. Inspired by the kindness of so many people, Nathan holds on to the belief that his mom will come home and his family will be reunited.

At only five years old, Saroo Brierley got lost on a train in India. Unable to read or write or recall the name of his hometown or even his own last name, he survived alone for weeks on the rough streets of Calcutta before ultimately being transferred to an agency and adopted by a couple in Australia.