Seville, 1649. A city ravaged by the Black Death, where the air is thick with the scent of incense and decay.

In a world surrendered to the plague, death is no longer a mystery. But when bodies begin to appear marked with a chilling, unknown symbol, The Bailiff Gaspar de Valdés realizes that a darkness far more calculated than the pestilence is stalking the streets.

His investigation leads him into a labyrinth of heresy and occult power. But before he can expose the truth, Gaspar is murdered.

Yet, his journey does not end at the grave.

Trapped in a spectral limbo, Gaspar awakens as a silent observer of the living. From this impossible state, he discovers that his death was no random act of violence-it was a vital sacrifice in a centuries-old ritual.

Joined by Alonso, a young novice whose faith begins to shatter under the weight of what he sees, Gaspar must hunt a shadow from beyond the veil. Together, they follow a trail connecting the plague to a secret brotherhood born from the ashes of the Knights Templar.

As the city teeters on the brink of annihilation, Gaspar and Alonso will uncover a truth that threatens the very foundations of the Church and history itself. In a city of shadows, some do not fear the plague-they fear what is about to be revealed.