The ancient communities of the Barn Owls and the Tawny Owls are locked in a desperade struggle for territory: a beautiful strech of woodland known as the Lost Domain.

But apart from civil war, there is another, greater danger on the horizon: a Monsters Owl is flying ever closer, killing every living thing in its parth. Long-time foes must forget their enmity and band together to stop the invader, if they are to save themselves, and The Lost Domain.

This epic tale is told by Yoller, a young and privileged Tawny who is destined to learn a great deal about love and life before the end of a period in owl history told once before, but quite differently, in The Ancient Solitary Reign.