School nerd Martin helps three school friends, Mike, Geoff and Frankie avoid a school field trip to Wales by taking all three of them, along with his dream-girl Liz (Thora Birch), to an old underground bunker. Together the teenagers party non-stop for three days in their sound-proof shelter, but when Martin doesn't return to let them out, the party atmosphere changes quickly into a living nightmare. Liz is found a few days later walking towards the school, covered in blood and traumatised. She is taken to a police psychologist where she tells her story; but when Martin is later picked up, he gives a very different account.

British coming-of-age drama directed by Michael Caton-Jones. The film follows troubled, London teenager Jamie Harrison (Letitia Wright) who has lived in care homes for most of her life after being abandoned by her mother. Her new, unconventional support worker Kate (Shirley Henderson) tries to help her realise her potential but Jamie's best friend Leanne (Isabella Laughland) is not so keen on letting her partner in crime abandon the life of drugs and violence they share together.