After a truck driver wakes up inside a coffin, he discovers that terrorists captured him and are holding him for ransom. All he has with him is a phone and a knife.
Despite the fact that this movie is filmed in a coffin the entire time, the movie interests us every step of the way. The claustrophobic setting makes the movie really tense. The fact that this movie is filmed in a coffin for the whole movie makes for an impressive feat.
Ryan Reynolds gave a gripping performance which carried this movie expertly. His emotions and facial expressions engage us in the movie in many scenes.
I'm not going to spoil the ending but it is quite unexpected and sad. However, it is fitting and the viewer understands why it was necessary. There was really no other fitting way for the movie to end.
In certain parts though, disbelief must be suspended. For example, I don't think his phone would've worked under the sand. Also, he probably would've suffocated long before the credits rolled. I don't think he would have had enough Oxygen to survive so long. These nitpicks don't completely take the viewer out of the experience but it does bug them a bit.
Overall, this is a pretty great movie. As long as you can get by the nitpicks then this will be a tense and claustrophobic thriller which will keep you on the edge of your seat the entire time.