Based on true events, When the Lights Went Out is set in Yorkshire, 1974. Britain is in recession, the oil crisis and black outs loom large.
The Maynard Family move into their dream house, only to find a “presence” already living there. Len (Steve Waddington), Jenny (Kate Ashfield) and their daughter Sally (Tasha Connor) must struggle to keep their already-fragile family together as they are attacked by poltergeists.
Soon it becomes apparent that Sally is their main focus of attention. The house becomes a living nightmare. They must exorcise the evil spirits for them to survive.