The new Netflix film The Power of the Dog stars Benedict Cumberbatch and Jesse Plemons as a pair of brothers who run a cattle ranch in Montana in the 1920s. When one brother marries, and brings his new bride (Kirsten Dunst) and her teenage son (Kodi Smit-McPhee) back to live with him at the ranch, the other brother gets jealous and sets out to destroy their happiness. The film is the latest from writer and director Jane Campion, and it's bound to be a big contender come Oscar time.