After winning the war for the Allies, Danger 5 have since disbanded, however when Colonel Chestbridge, their wartime leader, is brutally murdered in a London shopping mall and attempts are made on each of their lives, Danger 5 re-unite to mix up a fresh cocktail of revenge, intrigue and bullets. In a bid to protect the world and save Christmas, Danger 5 must go undercover as high school students, become fugitives of the law, battle gun-wielding dinosaurs, run from Nazi zombies, save the Pope, and even go back in time, all the while contending with an unwanted travel companion: Holly, a clueless, annoying American high school senior, who has unwittingly found herself at the centre of Hitler's devious new plan.