In an American prison child killer Oswald Danes is given a lethal injection but fails to die. CIA agent Rex Matheson is one of several severely injured hospital patients who should be dead but survive. The phenomenon is worldwide and the press dub it Miracle Day,when noone dies. Rex's colleague Esther Drummond attempts to contact the long disbanded Torchwood and is visited by Jack as a result. The pair survive an attack by a bomber - after Jack - whilst the bomber,though blown to bits,goes on breathing. Gwen and Rhys Williams are living in seclusion in Wales with their baby when Gwen's old colleague Andy tells her that her father Geraint is one of the sick people who cannot die and that the world will be over-populated in a matter of days. Rex and Jack arrive in Wales to bring Gwen back to the States with them.