War rages, loyalties are tested, and love is more perilous than ever in this thrilling and eagerly awaited sequel to the breakout hit Metal Slinger.

It's been four years since Jovie betrayed Acker, fracturing their relationship. Her decision to take King Edmond's magic, sparing his life at Acker's request, has sparked a brutal war. The Kenta and Strou forces ally against the Roison and Alaha, with Maile perched dangerously on the edge of their battles.

Jovie is determined to keep the innocent Maile people from a conflict she helped start―even if it means suppressing the Matching Bond and sacrificing any hope of repairing her relationship with Acker. Yet, visions of him continue to haunt her dreams.

Acker is resigned to aid in his father's war while in an arranged marriage with a wife who detests him. Though still pained by Jovie's deception, he can't stop his thoughts from turning to her. And Acker has found a way to slip into Jovie's dreams despite her attempts to stifle the Matching Bond. There he watches her, torn between his loyalties and desire.

When he discovers the chilling reason behind the return of his father's magic, as well as Edmond's dangerous new alliance, Acker must finally decide which war he wants to fight: the one for his king or the one for his heart.