Directed by Magnus Martens, this action thriller is an adaptation of Andy McNab's novel. It follows Special Air Service operative Tom Buckingham (Sam Heughan), who takes his fiancée Sophie (Hannah John-Kamen) to Paris via a high-speed train to propose. However, the train is hijacked by a small band of war criminals led by Grace Lewis (Ruby Rose), who is after something precious in the train that, if revealed in public, would jeopardize certain U.K. national security issues. The counterterrorism operative soon faces these so-called terrorists in a battle to uncover the truth.