When a Cardiff Hospital is inundated with patients who have fallen into coma-like trances, Torchwood move in to investigate. The trances appear to have been triggered by phone calls, all received on retro phones and made from a number that hasn't been active for over 30 years. Determined to find out who's been calling the unfortunate victims, Jack rings the mysterious number - two, oh, five, nine - nothing. It's a dead line. Until, it calls Jack back.....