Gutter King (2010)

Emerging from juvenile detention, a hardened streetwise youth finds himself adrift in a concrete landscape, a world away from redemption. When the innocent girl next door faces desperate circumstances, he's compelled to act. Driven by necessity, he descends into the brutal, underground arena of bare-knuckle fighting. Each bloody match is a gamble, a desperate attempt to scrape together the funds needed to save her. But this path comes at a cost, forcing him to confront his own demons and the violent realities of his existence, forever altering his future. He must decide if this is the life he wants.