Torchwood have been holding their own on the streets of Cardiff since Captain Jack's disappearance at the end of the first season when he went off to have fun with The Doctor. However, Jack's back, and just in time too as he takes the vital shot to take out a desperate alien blow fish type creature who is holding a family hostage

Jack may be back in the lives of everyone at Torchwood, but someone comes through the rift and back into Jack's life too. A former partner, in more ways than one, from the time of Jack's time agent days arrives and asks for help in locating some nuclear devices which have been planted around the city.

The newcomer though is not as nice as he first seems to be.......