While on a holiday diving trip, Susan and Daniel are accidentally left behind in the middle of the ocean. There are sharks. The film watches them as they start out hopeful that they've just drifted out of range of the boat, but gradually come to the realization that they have truly been left behind, with little hope of rescue. Despite the horrific situation, this isn't horror as such. It's a tense drama about two people in the most desperate of circumstances as they try to hold mind and body together. The digital video cinematography gives the feeling of holiday footage, which makes it all seem even more real. I thought it was a good film, but I found it very uncomfortable to watch.