For generations, the realms have lived in the shadow of a forgotten war. The spark that once held the Darkness at bay vanished with the death of Aurelia Kuro Kenshi-Eldia's greatest protector and the last bearer of the ancient light. Her sacrifice saved the world, but it also left it vulnerable.
Now, the spark stirs again.
Silo Kuro Kenshi, a quiet boy with no desire for destiny, begins to feel a strange warmth flickering beneath his skin-an echo of a power he does not understand. When a breach tears through the palace of Eldia and shadows spill into the mortal realm, Silo is thrust into a world of Guardians, runes, and ancient oaths he never knew existed.
As the Darkness awakens and the Barrier of Realms begins to fracture, Silo must confront the truth buried in his bloodline. But the spark inside him is unstable, unpredictable... and dangerous. The Guardians sworn to protect him fear what he may become. The Void hungers for the power he carries. And Silo himself is caught between two paths-one of salvation, and one of ruin.
In a world where light is fading and shadows grow bold, a single spark may decide the fate of every realm.
But only if its bearer survives.