When the world's population is gifted with immortality, the human race is doomed to become non-viable within four months as Earth's resources run out. CIA agent Rex Matheson discovers a secret conspiracy for the "miracle" event, and the clues lead him to the old Torchwood institute in Britain.

After the team are reunited, Jack ends up realising that he is now the most vulnerable person on the planet. A trip to America by plane ends up turning into a desperate battle to stay alive.

When the Torchwood team takes their chance to run, they are soon confronted with a new adversary that leads Jack to the mysterious Oswald Danes.

The Torchwood team follows PhiCorp to California to continue the fight, but walk straight towards a trap. Elsewhere, Oswald and Jilly face their own adversary.

While their enemy draws closer, Torchwood solves the mystery of the "Miracle Day" and uncovers the horrible truth.

Jack is left on his own when the rest of the team ends up trapped on different continents. However, time is running out and leaving him no choice than to go straight to the heart of the conspiracy.

To keep her family safe, Gwen is forced to follow and uncover the Miracle's long history.

While the society is on the verge of falling apart, Rex is forced to take drastic measures. Meanwhile, someone thought to be dead comes back to confront Jack.

With the whole world in recession, a defeated Torchwood team take their last chance and make a deal with the devil.

After discovering that Jack's blood is the key to stopping the Blessing, the two Torchwood teams launch simultaneously assaults on the facilities at Buenos Aires and Shanghai. However, a mole within the CIA threatens both operations.