Memphis, 1939. Twelve-year-old Rill Foss and her four younger siblings live a magical life aboard their family's Mississippi River shantyboat. But when their father must rush their mother to the hospital one stormy night, Rill is left in charge--until strangers arrive in force. Wrenched from all that is familiar and thrown into a Tennessee Children's Home Society orphanage, the Foss children are assured that they will soon be returned to their parents--but they quickly realize the dark truth. At the mercy of the facility's cruel director, Rill fights to keep her sisters and brother together in a world of danger and uncertainty.