Oklahoma, 1935: Fifteen-year-old Faith Wilson takes her little sister Hope's hand. In worn-down shoes, they walk through the choking heat of the Dust Bowl towards a new life in California. But when a storm blows in, the girls are separated from their parents. How will they survive in a place where just the color of their skin puts them in terrible danger?

Starving and forced to sleep on the streets, Faith thinks a room in a small boarding house will keep her sister safe. But the glare in the landlady's eye as Faith leaves in search of their parents has her wondering if she's made a dangerous mistake. Who is this woman, and what does she want with sweet little Hope? Trapped, will the sisters ever find their way back to their family?

California, present day: Reeling from her divorce and grieving the child she lost, Zoe Edwards feels completely alone in the world. Throwing herself into work cataloguing old photos for an exhibition, she sees an image of a teenage girl who looks exactly like her, and a shiver grips her. Could this girl be a long-lost relation, someone to finally explain the holes in Zoe's family history? Diving into the secrets in her past, Zoe unravels this young girl's heartbreaking story of bravery and sacrifice. But will anything prepare her for the truth about who she is...?