The travelling fair comes to town and Gina visits in search of runaway teenager Tracey Nichols. The fair's owner Brendan McCormac tells her that Tracey has returned to her family but in fact she is the lover of Brendan's son Sean who is hiding her. Tracey's Teddy boy brother and his gang arrive, looking for a fight, during which Tracey and Sean run away but he is fatally injured after being hit by a bus. Gina is dismayed when Jack Burns leaves to look after his wife. He is replaced by efficient Max Harper who investigates a sleazy murder committed by gangster friends of Fenton, who kidnap witness Rebecca. Other new arrivals at the station are clumsy PC Perkins and chief inspector Briggs' voluptuous secretary Susie. Gina is also the victim of Chief Constable Coulson's unwanted attention.