He and she lose their little son and she subsequently suffers from terrible anxiety attacks. Her husband is a therapist, and in spite of warnings not to treat people with whom you have close relations, they begin to tackle her fears together, and in the place where her anxiety is strongest: Eden, a deserted cabin in the woods. The tough therapeutic struggle develops into a battle of the sexes. Her fears inhabit them both and even he is not exempt from experiencing the merciless evil of nature. Natural brutality takes over and his cool reason is rendered futile. The evil in her runs wild.