Surgeon Ben  Bass (Idris Elba) and successful writer Alex Martin (Kate Winslet) survive a devastating plane crash in the mountains where they are forced to band together, trust one another and find safety while badly injured. Ben, with broken ribs, and Ashley, with a terrible leg fracture, must work together to weather the elements and escape the unforgiving wilderness.

Throughout their struggle, they learn more about each other and begin to fall in love.

Based on the 2010 novel by Charles Martin.