Only five years have passed since the arrival of the Black Ships, a symbol of Western encroachment, and Japan is already teetering on the brink of monumental change. In the heart of this historical turbulence stands Léopold Lafleche, an Assassin, who navigates a Japan that is not only facing the political turmoil of the Bakumatsu Era but also the emergence of supernatural elements and powers beyond this mortal realm. Callum Lynch, a modern descendant of Léopold, is forced to explore these intertwined worlds through the Animus, uncovering a narrative that blends historical intrigue with fantastical elements.