PC Des Taviner finds a terrified shoeless Chinese man on the Coal Lane estate, but when he is taken to the station for interview, there are serious doubts about the Chinese interpreter sent by the Yard, Mai Ann Wey. Unaware of these doubts, Taviner seeks Mai Ann's help when he discovers a flat full of illegal immigrants on the estate. When the immigrants all disappear and there are signs of violence, it becomes clear that Mai Ann is working for the snakehead gang, and Taviner turns to a reluctant Chinese priest, Father Kwong, to locate the immigrants. The court case against the boys who gang-raped Louanna Shaw nearly falls apart when Louanna's friend Beth loses her temper in court and the defence lawyer sees PC Kerry Young discussing the case with her husband PC Luke Ashton. Only Insp. Gina Gold's forceful testimony saves the day, but Young is furious with Ashton for jeopardising the case and insists their marriage is over. DC Mickey Webb is delighted when Ron Gregory's car is stolen,

Sun Hill police officers swoop into London's Chinatown to locate and arrest corrupt interpreter Mai Ann Wey. Desperate to make amends to Sgt. Sheelagh Murphy, PC Des Taviner manages to catch Mai Ann when she eludes the rest of the team. DC Mickey Webb is in turmoil after witnessing Supt. Adam Okaro having a friendly meeting with a suspected paedophile. Even a sceptical Insp. Gina Gold begins to have her suspiscions about Okaro when Webb sees him taking his own daughter to Gregory. Okaro is furious when Webb charges into a delicate covert op to ensnare Ron Gregory. Gregory is arrested, and the ""child"" in his boot is revealed to be civillian Front Desk Officer Roberta Cryer. Since there is so little evidence against Gregory, his solicitor demands his release. As Mickey drives Robbie home, they realise that Gregory's solicitor, Warren Napier, is in the paedophile ring as well. The pair break into Napier's house, and find a frightened little African girl in an attic room. As they try to es

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