Nancy finally sees the truth, but struggles to persuade Newman she is right. With nothing to lose, she must operate outside the law one last time.

As police comb the Le Saux haulage yard for clues, Nancy must hide her guilt from both a fraught Hayley and her colleagues – a task made more difficult when she realises to her horror that she's left incriminating evidence at the scene.

After her near-miss with Gunner, Nancy is challenged by Newman. She's treading a dangerous line and is in jeopardy of being exposed – until O'Dowd steps in to help. He tells Nancy that they must work in tandem, and together they question Nash. But Nancy's no nearer to finding out who's pulling the strings.

In the wake of the latest killing, suspicion shifts to garage owner and Le Saux associate, Duncan Elliot. Visiting Elliot, Nancy spots Theo Kettler's missing car, and a tense chase ensues. When the driver escapes, Nancy and O'Dowd start to suspect Gunner of complicity. A vital piece of evidence is later recovered from the car, giving DCI Newman a breakthrough - but placing Nancy in even greater danger.

Sick from her bullet wound and mistrustful of her colleagues, Nancy desperately needs an ally - but she can't open up to Hayley for fear of putting them both in danger. When the police make a public appeal hoping to shake out the missing witness, Nancy is unexpectedly forced into the spotlight, leaving her exposed and bringing an old enemy out of the woodwork - Hayley's ex-boyfriend, Shay Nash.

Detective Sergeant Nancy Devlin is a good cop with a dark secret - a loyalty to haulier and drugs trafficker Frank Le Saux, to whom she has been close since childhood. When a clandestine meeting ends in murder and Nancy is caught in the cross fire, her link to Frank suddenly risks being exposed.