A crew of five hazardous waste workers are sent to a massive, abandoned sanatorium deep in the mountains. But their routine assignment takes a dark turn when they encounter the building’s terrifying past.
An abandoned sanatorium is deteriorating in a remote forest in the mountains, and an elderly gamekeeper is making sure no humans or animals enter the dangerous building. Five contractors have taken on the task of inspecting the enormous building for hazardous materials before its demolition. They have over 300 rooms and several kilometers of pipelines to inspect over three days. Water starts to flow through the old pipes, making the job more challenging, and while they are attempting to shut off the water, they are led into a dark basement labyrinth. They soon find themselves face to face with the sanatoriums gruesome past.