We're catching up with Hayley Atwell's Denise again this eve, but this time we've moved from the Amy Reid investigation. 12 years on, it's 1997, and Denise is still working her way up the ranks. He whole world is turned upside down when a forensic discovery suggests Mike Holland may be innocent after all. Backed into a corner, Denise is forced to tell the boss about the evidence she planted back in 1985. As Holland presses for financial compensation, Denise's professional reputation is on the line, and her marriage begins to disintegrate.