S01E01Episode 1

Alison and Roger are step-brother and sister - their parents have recently married and they are on a family holiday in Wales. Nancy, her son Gwyn and Huw Halfbacon, the gardener, are keeping house for them. One evening Alison hears a curious scratching coming from the loft; Gwyn investigates and finds an old dinner service - with which Alison becomes increasingly obsessed.