Thousands of years ago the gods fought and fell in the deeps beneath what is now Southmarch Castle, then were banished into eternal sleep. Now at least one of them is stirring again, dreaming of vengeance against humankind.

Southmarch haunts the dreams of men as well as gods. Royal twins Barrick and Briony Eddon, the heirs of Southmarch’s ruling family, are hurrying back home as well: Barrick now carries the heritage of the immortal Qar inside him, and Briony has a small army at her back and a fiery determination to recover her father’s throne and revenge herself on the usurpers.

The cruel and powerful southern ruler known as the Autarch of Xis wants the power of the gods for his own, a power he can only gain if he conquers Southmarch.

And nobody knows what the Qar want, only that the mysterious fairy - folk are prepared to die for it — or to kill every living thing in Southmarch Castle and in all the lands around.

It will come to an apocalyptic conclusion on Midsummer Night, when the spirits of the haunted past and the desperate struggles of the present come together in one great final battle. Many will die. Many more will be transformed out of all recognition, and the world will be forever changed.

With King Olin imprisoned and Prince Kendrick slain, the royal twins Barrick and Briony have been forced to flee their homeland. But both families and nations can hide dark and terrible secrets, and even if Barrick and Briony survive learning the astonishing truths at the heart of their own family and of Southmarch itself, they must still find a way to reclaim their kingdom and rescue their home- from traitors, tyrants, a god-king, and even the angry gods themselves.

Darkness has fallen on the lands of the sun as an army of misshapen fey spill out from beyond the Shadowline. At their head is Yasammez, dark creature of nightmare. A furtive bargain was struck at the gates of Southmarch and the castle was spared, but centuries of enmity will not be set aside so easily.

Meanwhile, Barrick, heir to Southmarch and cursed with madness, has crossed the Shadowline into the realm of his people's ancient enemy. There are stranger things than death here — stranger and older.

Much further south, shadow is also falling over the reign of the Autarch: god-king and supreme ruler. Quinnitan, junior wife, must flee the royal household or die, her greatest secret as yet hidden even from herself. Ancient blood flows through her veins and she will become a unique weapon in the fight against the approaching darkness.

And beyond the ken of all but a chosen few, the gods are awakening and the world is changing.