Caleb and Nina Byrnes, long married and struggling financially, travel from Texas to California, following the route Caleb's grandmother took when her family migrated from the Dust Bowl in the 1930s. As Nina, an amateur photographer, chronicles the journey, they discover a secret in Grandma Vera's past. Learning about Vera's hardships and perseverance offers perspective into their own lives. And tracking down old friends may just help Vera in her waning years.