Tranquility belies its name. Behind the nursing home's serene exterior hides a sinister secret, and support worker Sarah Scott believes she knows what it is. But blowing the whistle would surely mean losing her job, and unemployment is not an option for a young, single mom who is struggling to find balance in her own life while caring for an ailing grandmother. Things come to a head when Edie is admitted to the locked unit. The feisty, Scottish woman does not act as though she has dementia, so why is she there? With the beginnings of a possible romantic relationship and her grandmother's health in rapid decline, Sarah is determined to have Edie released, but her plans are thwarted when Edie risks her freedom and her life to expose Tranquility's dark truth.