Sonnigsburg is a mystery; a town in the woods that hasn’t been visited for seventy years. Or so the legend goes. Nearby is the town of Mount Sunshine – and it’s there that our main character, Savannah, stops on her way to research Sonnigsburg. Savannah’s ex, Jade, has called her out of the blue, eight years after breaking-up and desperate for help – but when Savannah arrives in town and her past begins to catch up with her, the history of the town begins to seep through the cracks and she realises that the residents of Mount Sunshine are all haunted in their own way.

After almost drowning in a lake, Madison finds herself bound to a life of fear. Unable to describe what happened to her during the moments she was underwater, she begins to develop hydrophobia: an abnormal fear of water. Crippled by her post trauma, Madison attempts to shut out the world but her fear intensifies and she is faced with the vision of a dark figure that haunts her day and night. After watching her struggle for one year with the phobia and visions, Madison’s four friends attempt an unconventional intervention in which they accidentally open a floodgate to a dark place where none of them are safe. As Madison and her friends dive deeper into the dark history of this figure that haunts them, it reaches out and begins dragging them to a horrifying place that they can never come back from.