The movie follows the story of John "Coot" Cootes (played by Jason Statham), a former British Army soldier who works as a London-based coffee shop owner. After a brutal and intense fight in a London alleyway, Coot is forced to use his combat skills to protect a young woman from a group of thugs. This event sets off a chain reaction, leading Coot to embark on a mission to avenge his sister's death and take down the corrupt organization responsible.