Shauna Macdonald

When passengers on a train are attacked by a creature, they must band together in order to survive until morning.

A bigoted junkie cop suffering from borderline personality disorder and drug addiction manipulates and hallucinates his way in a bid to secure promotion.

After a personal tragedy, Sarah joins her friends on a caving expedition in the Appalachian Mountains. But when a rockfall traps them deep underground, their adventure turns into a nightmare. As they search for a way out, the group discovers they are not alone—lurking in the darkness are savage, cave-dwelling creatures. With rising tension and dwindling trust, the women must fight to survive against both the predators and each other.