The main character, Dr. Erik Függer, a CIA analyst can time-travel, navigates pivotal World War Two events to manipulate history and prevent the Nazis from obtaining the Atomic Bomb, ensuring key victories like the Battle of Britain and Operation Overlord, and averting pivotal deaths, including that of John F. Kennedy in 1943. His covert mission plunges him into a dangerous world of deception, as he battles historical threats and government assassins to protect and correct crucial timelines.