David Philips (Nicholas Hoult) is a typical teenager with a colourful interior life, who has to share his room and much of his daily space with his 16-year-old brother Ben (Tommy Jessop) who has Down Syndrome.
This gritty telemovie, written by the author of The Curious Incident of the Dog in the Night, tracks the actions of this frustrated and angry teen pushed to the edge by his whirl of emotions.
From the BBC's webpage for the movie:
Mark Haddon says, "I began writing Coming Down the Mountain with the idea of creating a meaty role for a young actor with Down’s syndrome. It ended up as a film about the stuff of every teenager's life – love, sex, anxiety, ice-cream, parties and nipple-rings."
MemorableTV.com provides some further information.