潜水者在蔚蓝海底，探索神秘水世界，鱼群伴随，心灵宁静无比。tuigirl

　　Two sisters go diving at a beautiful, remote location. One of the sisters is struck by a rock, leaving her trapped 28 meters below. With dangerously low levels of oxygen and cold temperatures, it is up to her sister to fight for her life.