As the Swedish town of Kiruna sinks, Frigga finds herself torn between her family and her job as security chief at the world's largest underground mine.

Julia is a young lawyer who has been in conflict with her father for a long time. Her mother seems a bit insane, and Julia thinks that he is partially responsible for this. She has also split with the father of her son and tries to escape all these concerns by working hard. On a new case, she is brought back to the house near the lake where she was raised to help a group of environmentalists to protect its natural beauty against the industrial project of a power company. But by doing so she has to fight the greed of the locals, and their trust in an evil spirit that is believed to be attached to the lake.