Panic room

Sometimes the danger is on the inside... High on a Cornish cliff sits a vast uninhabited mansion. Uninhabited except for Blake, a young woman of dubious background, secretive and alone, currently acting as housesitter. The house has a panic room. Cunningly concealed, steel lined, impregnable - and apparently closed from within. Even Blake doesn't know it's there. She's too busy being on the run from life, from a story she thinks she's escaped. Bu...