A family's road trip takes a dangerous turn when they arrive at a secluded mobile home park to stay with some relatives and find it mysteriously deserted. Under the cover of darkness, three masked psychopaths pay them a visit to test the family's every limit as they struggle to survive.

Libby Day was only eight years old when her family was brutally murdered in their rural Kansas farmhouse. Almost thirty years later, she agrees to revisit the crime and uncovers the wrenching truths that led up to that tragic night.

"Lost River" is a dark fairy tale about love, family and the fight for survival in the face of danger. In the virtually abandoned city of Lost River, Billy (Christina Hendricks), a single mother of two, is led into a macabre underworld in her quest to save her childhood home and hold her family together. Her teenage son Bones (Iain De Casestecker) discovers a mystery about the origins of Lost River that triggers his curiosity and sets into motion an unexpected journey that will test his limits and the limits of those he loves.