When the crew of the Kinloch Bravo find themselves cut off from all communication with the Scottish mainland by a mysterious fog, they must fight to find a way home whilst managing environmental pressures, mounting paranoia and rising tensions. But as the threat facing them reveals itself to be something beyond their wildest imagination, the divided crew must form an alliance to ensure survival.

When the crew of the Kishorn Bravo oil rig, stationed off the Scottish coast, is due to return to the mainland, a mysterious and all-enveloping fog rolls through and they find themselves cut off from all communication with the outside world. As the rig is hit by massive tremors, the crew endeavor to discover what’s driving the unknown force. But a major accident forces them to ask questions about who they can really trust.