An ordinary day becomes a world of terror as every single child in the world stops. A message is sent to the governments of Earth: 'We are coming'. As a trap closes around Captain Jack, sins of the past return, as long-forgotten events from 1965 threaten to reveal an awful truth.

The eyes of the world turn to Britain, as the 456 announce, 'We are here'. As a pillar of fire descends upon London, the members of Torchwood must battle to protect their own families, as the fight gets personal. But will Clem's memories destroy everything?