There is no dillydallying at the beginning of this movie. The action is quick with the audience immediately thrust into a plane which promptly crashes. (This is not a spoiler, it's clear in the trailer.) It's a story about perseverance and teamwork. Do or die. Kate Winslet and Idris Elba (whose beautiful eyes I could stare at on screen without a problem for quasi two hours, come to think of it Kate has stunning eyes too) are believable in their roles. For me, it fell apart in the end. On this point, I won't spoil it for you.
P.S. I want the dog in this movie.
http://www.tiff.net/tiff/the-mountain-between-us/