Two sisters on Mexican vacation are trapped in a shark observation cage at the bottom of the ocean, with oxygen running low and great whites circling nearby, they have less than an hour of air left to figure out how to get to the surface.
In a post-industrial port town that has long since seen the back of economic prosperity, car-jacker Rob does his best to care for his dying father. When a job goes terribly wrong, it threatens to destroy their already fragile relationship.
