When ex-Government agent Luke Wright (Jason Statham) exposes the Russian mafia for rigging an illegal fight, they seek revenge on his family and threaten to kill anyone close to him. Destitute and living alone on the streets of New York, Luke has given up hope until a chance meeting with a young girl changes everything.
Mei (Catherine Chan), a 10 year old mathematical prodigy, is abducted by Triad gangsters wanting to use her unique ability to memorise a secret code. When the Russian mafia and a group of corrupt cops also launch a plan to kidnap Mei, it's clear she holds the key to something deeply dangerous and these men will stop at nothing to get it.
Over the course of one harrowing night Luke snaps back to life and tears through the city's underworld.