A prince, a king, an oath to bind and an oath to break. Can something begun in darkness survive the light? Or does the shape of that oath define love...and the circle unbroken?

Three months have passed since Macsen Cadoc's rescue of Bran Fionnan-three mortal months, three days in Macsen's Red Kingdom. Bran is seeking a place for himself as sidhe, as Summer's Prince and as Macsen's consort, and the Red King has started to balance the thirst of his own nature with the love that now moves him just as much. Yet when Bran is reminded of an oath that was made between them when he was just a child, that which has so far held them together may end up tearing them apart.

While the strength of their love is tested, a mortal enemy is once more in motion. Focused only on their destruction, Dealla seeks to step into the place of her dead father-to rule over the Milesians and fulfill the oaths of crown and country. To do so, she must find a way to hurt two foes...one new and openly deadly, the other ancient and its enmity long asleep. Allies appear in unlikely places, armed by their own motives to seek the same destruction Dealla desires... But the price of success may be higher than the cost of failure-higher than any plot or plan allows.

What is the price of an oath fulfilled? Is love born from nothing, or does it wear a path that can be traced?