'I'm the only one of the cause left in this country, and if any invader thinks they're gonna come into this house and take me, then they better be ready for a fight.' Storm clouds are gathering on the Divided Isle. Oona kavanagh's home has escaped the worst of the ravages of war, but now the invaders from th ruined Black North are threatening. When Oona's twin brother Morris is kidnapped, Oona is forced on a journey to the furthest reaches of the country to rescue him. With the rumours of the Echoes - a mysterious. blight creeping across the land - and the Briar-Witches and invaders at her heels, can Oona save her brother before the South turns as Black as the North?