Ali (Schoenaerts) dreams of becoming a professional boxer. When he is suddenly put in charge of his five year old son, he moves in with his sister for support. Whilst working as a nightclub bouncer, he meets the beautiful and confident killer whale trainer, Stephanie (Cotillard). He gives her his number, not expecting that she will ever call. After being the victim of a tragic accident, Stephanie surprisingly turns to Ali for support. These lost souls discover new meaning in life together when Ali enters the dangerous world of underground boxing.