There's a part of the city that no one much goes to, a collection of rundown old houses and gloomy streets. No one stays there long, and no one can explain why - something's not quite right there.

Now the Council is renovating the district, and a new company is overseeing the work. There will be street parties and events to show off the newly gentrified neighbourhood: clowns and face-painters for the kids, magicians for the adults - the street entertainers of Cardiff, out in force.

None of this is Torchwood's problem. Until Toshiko recognises the sponsor of the street parties: Bilis Manger.

Now there is something for Torchwood to investigate. But Captain Jack Harkness has never been able to get into the area; it makes him physically ill to go near it. Without Jack's help, Torchwood must face the darker side of urban Cardiff alone...