Oxygen

Deep in the woods, in a makeshift coffin lies a woman whose only hope is mercy from the psychotic man who buried her or the power of a cop who can break him. There's no light, no time, no escape and the Oxygen is running out. This edge-of-your-seat, no-holds barred thriller escalates from a cat and mouse game of wits to a nerve shattering conclusion that will leave YOU breathless. (official distributor synopsis)