An unknown entity, named "The Centre," tells its story about how it was born from the Earth itself and has witnessed the evolution of the dinosaurs, the meteor shower, and mankind's evolution. Due to man's capacity for war and violence, the Centre has concluded that they must be eradicated.

At the end of the Korean War, United States Air Force pilot Hal Jordan and his wingman, Kyle "Ace" Morgan, are attacked by enemy pilots but survive. In Gotham, J'onn J'onzz – the last survivor of the Green Martian race – is teleported to Earth; unable to return, J'onn disguises himself. In Las Vegas, Iris West is on the telephone with her fiancé Barry Allen – also known as the Flash – at a casino when Captain Cold arrives to commit robbery; he races from Central City to confront Cold. Flash finds the five bombs hidden by Cold and captures him, before Cold is possessed by an entity.................