After a tragic accident, six friends reunite for a caving expedition. Their adventure soon goes horribly wrong when a collapse traps them deep underground and they find themselves pursued by bloodthirsty creatures. As their friendships deteriorate, they find themselves in … Shauna Macdonald, Natalie Mendoza, Alex Reid, MyAnna Buring, Saskia Mulder, Nora-Jane Noone, Leslie Simpson Added on Amazon Prime 2023-07-25. Youtube Trailer