When Mike and his friends decide to go for a day's cruising around the coast of Scotland, they are surprised to come across a mysterious barren island that doesn't show up on any map or satellite image. Determined to explore it, they make some chilling discoveries. But still none of them quite realizes the trouble they're in.

When Mike and his friends decide to go for a day's cruising around the coast of Scotland, they are surprised to come across a mysterious barren island that doesn't show up on any map or satellite image. Determined to explore it, they make some chilling discoveries. But still none of them quite realizes the trouble they're in.