Alice Racine is an interrogation officer who is forced to live in London after a failed operation during a terrorist attack in Paris. She now works undercover at a community centre in an area known for Islamic extremism. However, the CIA discover that there's a planned biological attack by radical imam Yazid Khaleel. She is called by her mentor back into action, but soon ends up running for her life with the help of a former soldier, as they try to prevent the lethal London attack.