Watch HDToday. Set during the First World War in February 1916. In James Callaghan's last 15 minutes, his friends watch and wait as he's tied to a post and blindfolded after being found guilty of cowardice and desertion within the British Army. Fronted by 17-year-old, Wilfred, the 6-man firing squad, all similar in age, are ordered to aim, fire, and execute, ritualistically, carried out supposedly in the interests of discipline and morale.