Danny Harvey (Scott Adkins), has spent all of his life fighting - in the playground, on the football pitch and then heading up the Green Street Elite.
Fourteen years ago, Danny turned his back on football violence and channelled his ability to fight into the world of MMA. After running with the GSE for years Joey (Billy Cook), Danny's younger brother, who is also skilled in MMA, took the advice of his big brother and got his pro licence.
But when Joey is killed in an organised fight, Danny knows the only way of finding out who killed him and avenge his brother's death is to return to his old manor and get back into the firm. But Hooliganism has moved on. The fighting has become much more organised and sophisticated. Danny�s MMA skills are going to be more useful than he ever thought possible.