When Paul (Ryan Reynolds), an American contractor in Iraq, woke up, he found that he was surrounded by darkness and could not see anything. After constant exploration, he found a lighter, a knife and a mobile phone at hand, and he seemed to be locked in a coffin and buried alive somewhere in the desert. He couldn't remember how he was imprisoned here. In this dark and narrow environment, Paul kept trying to contact the outside world, wondering what happened to him. As time went by, Paul finally knew what happened to him. However, the most critical situation at present is how to escape from the predicament. There is only one mobile phone that can contact the outside world, and the power is running out. How to make reasonable use of this only thing? Paul finally contacted the relevant US military departments with his mobile phone, but he had no idea where he was. What should he do?