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.
I'll tell you why so serious
How sad is this?
Good story, Not enough for a whole film
If the ambition is to provide two hours of instantly forgettable, popcorn-munching escapism, it succeeds.