London, 1967. The Cold War shows no sign of thawing, and Britain stands on high alert as the superpowers vie for dominance. Inside the intelligence services, mistrust runs deep, and new tactics are born out of shadow and suspicion. But when a senior officer uncovers secret experiments that cross every moral line, his resignation sparks a deadly chain of events, triggering a race against time to prevent a catastrophe that threatens not just Britain, but the world.