David’s release from prison provokes a range of emotions among his family and friends. Meanwhile, Cathy Hudson is tasked with leading a new investigation into Tara’s death.

Lives start to unravel as the investigation gathers pace, while David tries to piece his life back together, determined to be reunited with Jack and Rosie.

The investigation focuses on Alice and Tara’s relationship, and new facts come to light which lead to a breakthrough in the case.

David’s attempt to repay his debts has a devastating effect. Elsewhere, Cathy is suspended from the investigation but decides to pursue her suspicions.

DCI Mike Braithwaite reinvestigates the murder of 16-year-old schoolboy Matthew Taylor. Five years prior, the teacher convicted of killing him is found not guilty on appeal and released from prison.

As Sally begins a confident return to work, the police question Anna Stamp as they attempt to uncover what it is she is hiding, and more importantly what are Matthew's parents covering up?