Tells about two sisters named Lisa and Kate who tried to swim in the shark cage, because they wanted to see the flock, causing the chain that hooked the shark cage to break up, they finally got trapped and could not get out, Lisa and Kate had to swim to the surface before their gas tank runs out. This film is interesting, but boring, there are some scenes that surprised me but the film closed with a bad ending.

There us no logic in movie because after accident when one sister went at surface why the other guys didn't went down to take other sister because these adventure teams have emergency oxygen tanks and why that sister when came down didn't take her sister up with her why were they waiting for cage to be lifted. Nonsense movie

It's a bit slow but shows you what can happen I enjoyed it

A solid, easy to watch shark-attack movie.Not without its flaws, but mostly ones of the sort that won't bother non-dive experts. This stands up well alongside such films as The Reef, The Shallows, Open Water, Black Water, Rogue, Frozen, and the like.CG sharks have pretty much been cracked now, and so has underwater blue-screen, so there's not much in the VFX to distract the viewer from all the typical cat-scares required of the genre.Nicely shot, with good light and good lenses on the surface, and chopped broccoli (no lie) in the tank to add particulates to the underwater scenes. Overall, it works pretty well. The film looks slick and professional throughout. The script, as is often the case with these type of films, is the weakest link, closely followed by the acting. However, nothing about it is bad. Just not great.Unusually for a film in this genre the running time is respectable; none of the usual 75 minutes malarkey that leaves you feeling short-changed. And unlike most films in the genre, this one doesn't fill half its running time with boring and poorly executed setting-up (padding) at the beginning. It jumps straight in, so to speak, and fills almost the full 90 minutes with actual story and action. This alone makes it stand out.However, despite its many good qualities and general lack of failings (apart from factual errors which can be ignored in the interest of drama), there is one rather unforgivable blemish which somewhat spoils the whole experience, and that is the ending, which is weak, contrived, and entirely unsatisfying. Trying hard to avoid spoilers, I'd say that the film would be vastly improved by ending it on the surface, rather than what happened afterwards. But maybe that's just me. Overall, though, a very enjoyable addition to the genre.