Lamb, based on Bonnie Nadzam's novel, follows David Lamb in the weeks following the breakdown of his marriage and the death of his father. He focuses on Tommie, an awkward and unpopular eleven-year-old girl, to rebuild his faith in his own good intentions. It's not long until Lamb convinces Tommie that she needs to experience the splendor of the Rocky Mountains. The journey disturbs them in unexpected ways.