There are two halves to this promising, low-budget British feature: the first is a lovely, bittersweet tale of young friendships and unrequited love; the second is more problematic, a violent slice of lurid psychodrama. Set in a Norfolk caravan park, it stars Thomas Turgoose (This Is England) and Holliday Grainger as David and Emily, two lifelong friends whose future together is threatened when Emily's estranged father reveals plans to take his daughter away. Emily disappears, prompting a huge local manhunt, but in spite of his statements to the contrary, David knows more of her whereabouts than he is letting on. Up until this point, director Tom Harper's feature debut is a wistful and atmospheric drama, with superb performances from Turgoose and especially Grainger. A strong stomach, however, may be needed for the climax, in which all the story's subtleties are blown away by a heavy-handed twist that, poetic as it may be, seems to have drifted in from another film entirely.