Paris, 1636—a city of splendor and squalor, where secrets lurk in the fog-choked streets and shadows hide more than mere criminals. Shiin Hakai, an exiled shinobi fleeing his bloodstained past in Japan, arrives seeking refuge, only to find himself entangled in a conspiracy that threatens the fate of nations.

A clandestine order known as Crescent Moon pulls the strings of kings and emperors, shaping the course of history from the darkness. Hunted by assassins who cannot die and marked by an ancient force beyond his understanding, Shiin is thrust into a battle not just for survival—but for the truth. From the hidden chambers of Cardinal Richelieu's court to the blood-soaked alleys of Madrid, he must confront an enemy that has ruled from the shadows for centuries.

A fusion of historical intrigue, supernatural terror, and relentless action, Shadow of the Crescent Moon is a tale of vengeance, destiny, and the cost of uncovering forbidden secrets.