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.

In 1943, two British intelligence officers concoct Operation Mincemeat, wherein their plan to drop a corpse with false papers off the coast of Spain would fool Nazi spies into believing the Allied forces were planning to attack by way of Greece rather than Sicily.