In the aftermath of the chaos and tragedy of Godsnight, the heirs find themselves struggling to recover and determine their next moves. But when Phos, the god of light, stages an attack on their realms in a bid for cosmic control, the heirs decide to take the fight to Phos in Solara, the realm of light.

But once in Solara, they discover a realm terrorized by the myth of the Sunslayer who has been targeting those in Phos's bloodline. In order to forge a delicate truce in an attempt to buy time, Nik, Rian, and Julian set off to capture the Sunslayer; while Angelica, Risha, and Dante remain in the city to search for a way to defeat Phos for good.