Feral is the insight of a few months in the life of Hayley Rosa, a girl who has nothing but a bitter will to fight. Upon drifting to a new city to scrape a living hustling with her fists, she is beaten for the first time by the highly skilled Dr Brandt, a loss that came with personal consequence. It was a new and humiliating experience for her, something that she couldn't shake off and leave alone.

Upon learning that Brandt is the top tier of a prestigious fighting circuit based in the city, she joins up to prove herself and take the doctor down by beating him at his own game. Between them stand a set of brutally proficient and sometimes sadistic fighters from all over the world who test Hayley to the very brink of her ability.

Among the battles however, she neglects the demons rising up inside her with every fight, chewing at her morals and sanity, fueled by a past she cannot let go...