Just how low do people sink to get away with murder? A human skull unearthed on the outskirts of Reykjavík. A neighbourhood dispute turned deadly. A daughter, trapped at sea, looking for answers. What police officers Týr and Karó don’t know is that these events are all linked through a terrible tragedy, many years ago, when a trawler caught fire on the waves, the crew trapped inside. The answers lie buried at the bottom of the barren Icelandic Sea.