All six episodes of the supernatural children's drama from writer Russell T. Davies. When teenager Tess Hunter (Catherine Sanderson) arrives with her pregnant mother in the town of Century Falls, she finds the town strange and the locals suspicious. With very few children around, she soon latches on to twins Ben (Simon Fenton) and Cairey (Emma Jane Lavin), who have recently returned from exile, and who soon let her in on the strange secret of Century Falls. 40 years ago the townsfolk tried to conjure up a demon, with disastrous results. Even worse, they have plans to try the dark ritual again - and only Tess can stop them.