Icelandic sisters Áróra and Ísafold live in different countries and aren't on speaking terms, but when their mother loses contact with Ísafold, Áróra reluctantly returns to Iceland to find her sister. But she soon realizes that her sister isn't avoiding her, she has disappeared, without trace. As she confronts Ísafold's abusive, drug-dealing boyfriend Bjorn, and begins to probe her sister's reclusive neighbours - who have their own reasons...