In the Torchwood hub Gwen discovers that she is pregnant. Her joy is short-lived when Captain Jack discovers that a bomb has been impregnated in his stomach. Gwen and Ianto have just two minutos to escape a devasting explosion.
Captain Jack, Gwen and Ianto face their greatest threat yet when children all over the Earth stop moving, stop playing, stop laughing, stop everything, and begin to speak with the same voice, announcing the imminent arrival of a new alien threat.
From their temporary base Gwen, Ianto and Clement listen in on the Government as 456 makes its demands of Frobisher. The 456 want a gift, they want the children. Clement remembers the first time the 456 came to Earth in 1965.
As a desolate Gwen records a video message explaining how the world ended, the Government urge parents to send their children back to school for innoculations against the 456. But are the innoculations really for protection?
A bomb at the Torchwood Hub has separated the team. As Captain Jack lies shackled in a secret government prison, the children of Earth once again stand still, the chilling chant of 'we are coming tomorrow' echoes around the planet.
The Government are preparing to bargain with the 456 and must decide which children will be sacrificed. As Lois watches on, recording every sinister word spoken, Captain Jack and his team sense a way into Thames House and an encounter with the 456.
Having overpowered a security guard in the secret government prison, Gwen and Rhys frantically buscar the cells for Captain Jack. But when Gwen is spotted on CCTV they are very quickly overpowered por an army of guards. Can Ianto come to the rescue?
