Escaping a traumatic childhood, Sasha finds peace, sanctuary, and purpose in a martial arts dojo whose sensei teaches her the ways of the samurai warrior. An accomplished black-belt fighter, she now happily dwells in the dojo, tucked away from the streets of Manhattan, until a midnight call sets her on a path into an underground world. Struggling to pay off a gambling debt, her brother Danilo is severely injured in a no-rules club fight run...