1984 - Suffolk, England.
When 17-year-old Eva goes missing at sea, everyone presumes that she drowned. Her parents' relationship is falling apart, undermined by guilt and grief. But her younger sister, Faith, refuses to consider a life without Eva; she's determined to find her sister and bring her home alive.
Close to the shore looms the shape of an island -- out of bounds, mysterious, and dotted with windowless concrete huts. What nobody...