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The film opens nearly two decades after the last child was born. The resultant global infertility sparks war, refugee crises, and societal collapse. As the rest of the world has succumbed to chaos, Great Britain has turned into a fortress, its borders tightly secured against the stream of desperate refugees seeking refuge. Theo, voiced by Clive Owen, is introduced as a weary bureaucrat, seeking to maintain his mundane existence amidst the madness.

A Devastating Trigger