A swift-moving, no-punches-pulled expose set in London's tenement district, with a ruthless teenager (James Kenney, reprising his stage role) blackjacking an old woman to get her purse, and "graduating" to gang leader whose young cutthroats spread terror over the entire city. At the start of her "bad girl" career, Joan Collins is the girl he loves and leaves, with tragic results. A controversial motion picture in its era and still potent today. Based on the play, "Master Crook."