The team investigate when the body of an eight-year-old boy is discovered but, as they search for the paedophile killer, they are unaware that the culprit has placed himself at the heart of the child's grieving family. Dom's HIV test is negative, but in his relief he does something stupid which jeopardises Rachel's sergeant's exam. Sean thinks that he and Rachel are destined to be together, although she is not convinced. Janet is persuaded to give things a go with Andy, but finds herself having doubts.