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Following the brutal murder of his friend Kenji by the masked killer "Darkface"—a criminal who leaves a feather on his victims—an anxious and grieving Samuel Rosenberg becomes involved in the investigation led by Detective Vincent Moreau. When a mysterious forgotten note accidentally catches his attention, Samuel decides he cannot simply stand by. His discovery will lead him straight to the cold, damp alleyway where his friend lost his life, plunging him into a lethal face-to-face confrontation with the killer himself.