Ashai Larish is an assassin from the brutal Denari Lai order. Religious zealots, Denari Lai are kept loyal through an addiction to the same magic that makes them unstoppable. They have become the primary weapon for the nation of Nishi'iti, and in a hundred years, they have never failed.

Until now. Ashai must kill Pushtani King Abadas Damar and his daughter/heir, Makari. He infiltrates the king's inner circle, putting him in the perfect place to strike, with only Captain Bauti of the Royal Guard at all suspicious of Ashai's intent.

Except Ashai has fallen for Makari and cannot complete the hit. When a second Denari Lai kills the King, Ashai finds himself fighting for Makari's life instead of taking it. To make matters worse, the order cuts him off from his magic, leaving him weakened and in withdrawal.

Meanwhile, far north in the Pushtani mines that border Nishi'iti, a slave named Pachat learns that his love, a hand slave to Makari, died at the hands of a Denari Lai assassin. His grief ignites a slave rebellion, and Pachat becomes the unwilling leader of the revolt. Urged on by Nishi'iti guerrillas, the rebellion sweeps across the borderlands, threatening to erupt into all-out war. Yet all Pachat wants is to avenge his beloved's death by killing the assassin, so he walks away from the rebellion to seek when it needs him most.

As Pachat makes off for the capital of Dar Tallus, Ashai is forced to rely on that city's organized crime gang to hide from the second assassin, and from Bauti's guards. Despite his best efforts to hide it, Makari discovers Ashai's true identity, and suddenly, he finds himself without her love, without his faith, and without the Denari Lai. At rock bottom, he doubts he can do anything but cause more damage.

Can Ashai kill the second assassin and win back Makari's love? Will Pachat gain the revenge he so lustily seeks?