A commanding performance from Huston and a car sat nav machine called Cynthia make it worth seeing.

Huston and Jacobs have a marvellously spluttery chemistry, even as events in the mountains reduce them to a pair of wretched creatures, clinging to one another while the cold night gnaws their bones.

Writer-director Bernard Rose completes his Tolstoy adaptation trilogy with this engaging, painfully topical and sharply written drama, heightened by a terrific pair of performances from Danny Huston and Matthew Jacobs.