Paul Conroy (Ryan Reynolds) is a U.S. citizen working as a contract driver in Iraq. After a swift and sudden attack on his convoy, he awakens to find himself buried alive inside a coffin with nothing more than a lighter, a cell phone, and little memory of how he ended up there. Faced with limited oxygen and unlimited panic, Paul finds himself in a tension-filled race against time to escape this claustrophobic deathtrap before it's too late.

If the sheer logistics of this premise are enough to make your head hurt, rest assured that director Rodrigo Cortés tackles these issues with relative ease, aided a great deal by a superbly convincing performance by Reynolds, the lone on-screen actor in the film. The result is a gripping and suspenseful thriller that will leave you gasping for air until the very end.