It's 1863, and Thomas and his little sister, Birdie, have fled the farm where they were born and raised as slaves. Following the North Star, looking for freedom, they soon cross paths with a Union soldier. Everything changes: Corporal Henry Green brings Thomas and Birdie back to his regiment, and suddenly it feels like they've found a new home. Best of all, they don't have to find their way north alone -- they're marching with the army. But then orders...

"Martha Tom knows better than to cross the Bok Chitto River to pick blackberries. The Bok Chitto is the only border between her town in the Choctaw Nation and the slave-owning plantation in Mississippi territory. The slave owners could catch her, too. What was she thinking? But crossing the river brings a surprise friendship with Lil Mo, a boy who is enslaved on the other side. When Lil Mo discovers that his mother is about to be sold and the rest...