The truth behind Halla and Gisli's bond comes out, resulting in shocking tragedy.
The killer is revealed. Not before he does something drastic.
The town's water is polluted. Andri and Hinrika discover more clues, as does Ásgeir.
Vikingur is arrested for murder. And still, the truth is more complicated.
Andri, now with the Reykjavik police, must return to his former town to investigate a brutal suicide and attempted murder.