Ethan Blackwood, a cynical ex-soldier haunted by his past in Afghanistan, loses his leg and arm in a freak motorcycle accident. Bitter and withdrawn, he finds solace only in protecting his neighborhood from local thugs. One fateful night, defending his neighbor, Clara, Ethan suffers a near-fatal beating. He awakens in a hospital to find a sentient, talking raven named Corvus perched on his bed. This encounter unlocks a dormant power within him, a monstrous strength and agility. He soon discovers he's been infected with the 'Aethelred Strain,' a genetic mutation originating from an ancient, fallen angelic entity. As Ethan embraces his newfound abilities, a clandestine organization, the 'Order of Gabriel,' hunts him, believing he's a threat to the delicate balance between the mortal and celestial realms. He must learn to control the Aethelred Strain, uncover its origin, and decide whether he will be a savior or destroyer.