The Descent

Sarah is picked up by her husband Paul and daughter Jessica after a whitewater rafting trip with her thrill-seeking friends Juno and Beth. Paul is distracted on the ride home, causing a car crash that kills both him and Jessica. Sarah awakens in the hospital and collapses after Beth tells her about their deaths.

One year later, Sarah, Juno, and Beth reunite for a spelunking adventure in the Appalachian Mountains of North Carolina along with sisters Sam and Rebecca, and newcomer Holly. They hike to a mountain cave entrance and descend. Making their way through the caves, Sarah becomes stuck in a narrow tunnel, but manages to escape before it collapses, blocking the way back. Juno admits that she has led the group into an unexplored cave system instead of the mapped one they had filed with local authorities, which means that a rescue party would be unable to locate them.