The Dragon's Pearl has shattered in the heart of Seoul, unleashing a storm of curses great enough to drive people into a zombie rage. Sensing an opportunity to crush the Were Nation's stronghold once and for all, Frost King Aleksandr lays siege from the north with an army out of Slavic legend. Meanwhile within the city, something more terrible still haunts the frightened civilians.

Still reeling over the shock of betrayal, Citlalli Alvarez is separated from her half-sister Raina and her family. Now trapped inside a nightmarish Seoul and unable to make contact with the outside world, Citlalli's werewolf pack teams up with the dragon-shifter Yong twins in a desperate last stand. As Were agencies from across the globe intervene to stop the spirit world's secret from getting out, Citlalli, Sun Bin, Ankor, and Vampyre Prince Khyber attempt to find the lost Dragon King, who may be the only one powerful enough to save Seoul.

Meanwhile, Raina gets drawn into Rafael's crusade for revenge that takes them deep into the mountains of Japan to the Vampyre Court's notorious Death Palace. However, a familiar face from Rafael's past reemerges, and Raina is faced with a choice of how far she will go for vengeance.

As the war against the Vampyre Court engulfs the streets of Seoul, no one is safe and nothing is certain. Before the Red Night can end, the price of power must be paid.