Shell is a 17-year-old woman who lives and works at a petrol station in the desolate Scottish Highlands. Apart from the occasional customers who call by for fuel, Shell's only company is her reserved and softly spoken father Pete, to whom she is devoted. On the cusp of womanhood, she Is struggling to re-imagine her role within her family and in life in general. Pete, meanwhile, still keenly feels the absence of his wife, who ran away when Shell was four, while his connection with his daughter is both difficult and disturbing.