Stamp and Hemmingway arrest a man for erratic driving, but he surprises them by confessing he raped a woman the night before. As Masters and Sim investigate, they discover that the man had been drugged with rohypnol, and when the missing victim is traced, it is far from clear which of them is the guilty party. Meanwhile, new recruits Lewis Hardy and Emma Keane join the relief. Hardy and Valentine investigate the theft of a car from a businessman working in Dubai, but Hardy finds himself with an official complaint lodged against him for an overzealous arrest, while fellow newcomer Keane assists Kapoor with investigating a bogus charity worker accepting cash donations.