An oil rig in a storm. A woman in a trap. After "Fjord," Kindle bestselling author Halvar Beck delivers another breathtaking thriller from the far north. The young doctor Kristin Jørgensen has only recently taken up her position as head of the medical ward on Oil Rig 77, a North Sea drilling platform. Her brother Marius has been working there for years. Together, they plan to fly back to the Norwegian mainland to celebrate their father's birthday - it could be his last. However, Marius is not on board the helicopter as planned. All attempts to contact him are unsuccessful. Kristin is deeply troubled, especially when she learns that there have been other unresolved cases of missing persons on Oil Rig 77 in the past. She sets out to uncover the truth - back to the oil rig battered by fierce storms - and finds herself in danger.