Four out-of-condition, middle-aged buisnessmen sent off on a team-building exercise in the Lake District succeed in being the first people ever to get shipwrecked on an island in Derwentwater.
Bound in by fog, menaced by wildlife and cut off from the world, this perfunctory middle-class exercise turns into a carnival of recrimination, French cricket and sausages.
What should have been a bonding process for Gordon, Angus, Roy and Neville turns into a muddy, bloody fight for survival. Because when night sets in, strange things happen out in the wilds. And what took place on Neville's island that foggy November weekend none of this particular middle-management team would ever forget ...