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This brooding, artfully composed debut from writer-director Scott Graham explores the complex relationship between vulnerable 17-year-old Shell (assured newcomer Chloe Pirrie) and her taciturn, epileptic father (Joseph Mawle) as they run a petrol station in a remote corner of the Scottish Highlands.

Mum disappeared years ago, customers are scarce and deer meat is subsistence food for the couple during the long winter months.