Paul Conroy (Ryan Reynolds) is not ready to die and when he wakes up six feet underground in a wooden coffin with only a mobile phone and lighter - time is not on his side. Buried alive with no idea of who put him there or why life for Paul becomes a hellish struggle for survival. Poor reception a rapidly draining battery and a dwindling oxygen supply are his worst enemies in a tightly confined race against time: Paul has only 90 minutes to be rescued before his worst nightmare comes true.