British film The Descent follows a group of friends who go on a hiking trip, but it all goes wrong.

Sarah (Shauna McDonald) is on holiday with her husband and daughter, but in a tragic car collision they are both killed instantly, the film see's Sarah a year on going on a hiking trip with a group of close friends. The group decides on a caving adventure for the day, setting off in the sunshine it seems like a great day for an expedition. But when they get trapped in a cave they soon realise they are not alone.