For scuba enthusiast sisters Drew (Sophie Lowe) and May (Louisa Krause), their choice of an isolated location to go below turns devastating when a subsea rockslide pins May to the ocean floor, 90 feet down. Unable to budge the boulder off her sibling, Drew faces a desperate race to surface safely and seek help-as May tries to cope with the terror of her oxygen supply running out, in this effective and unnerving two-hand thriller. 91 min. Widescreen; Soundtrack: English.