A group of workers on a remote Scottish oil rig are due to return to the mainland when a mysterious fog enshrouds them and supernatural forces take hold.

A group of workers on a remote Scottish oil rig are due to return to the mainland when a mysterious fog enshrouds them and supernatural forces take hold.

A cat-and-mouse drama, which focuses on the intense mental conflict between detectives and suspects. The stories take place within the confines of a police interview suite.