A friend of Gwen's has recently done an impressive bit of slimming, thanks to a new Cardiff weight-loss clinic with a incredibly simple system, and now Rhys wants to give it a try. Elsewhere in the city, an ordinary woman with superhuman strength and a rapacious appetite attacks a group of teenagers. Eight women have disappeared over the past few days, and the police fear they may have a serial killer on their hands, but as the body count rises and the hungers grow, the Torchwood team realise there may be something much more dangerous than a serial killer at work. This work features characters from BBC's "Torchwood", as played by John Barrowman, Eve Myles, Naoko Mori, Burn Gorman and Gareth David-Lloyd.