When entrepreneur Flosi arrives home for dinner one night, he discovers that his house has been ransacked, and his wife Gudrun missing. A letter on the kitchen table confirms that she has been kidnapped. If Flosi doesn't agree to pay an enormous ransom, Gudrun will be killed. Forbidden from contacting the police, he gets in touch with Áróra, who specialises in finding hidden assets, and she, alongside her detective friend Daniel, try to get to the bottom of the case without anyone catching on. Meanwhile, Áróra and Daniel continue the puzzling, devastating search for Áróra's sister Ísafold, who disappeared without trace. As fog descends, in a cold and rainy Icelandic autumn, the investigation becomes increasingly dangerous, and confusing.