The exploits a team of people whose job is to investigate the unusual, the strange and the extraterrestrial.

Night nurse Elaine Dobbs may be overworked and underpaid, but she has created a very special atmosphere in her ward and is extremely attentive to her patients. However, rather too many of them are dying.Inspired by the real-life case of four nurses in Austria who were tried for the murder of 42 patients in their care, this chilling drama stars comedian Dawn French in her first serious role, as an apparently irreproachable carer.