With Bill McGuire now firmly in her sights, Fia is struggling to find the evidence she needs to bring the case to a close.

As the Roisin Hurley case appears to have been solved, Fia knows there is more to the story, and with the help of her partner Cian Furlong, she takes the law into her own hands.

The past and present begin to merge for DI Fia Lucey.

With the murder victim's daughter missing, Fia is in a race against time.

With the case confirmed as a murder, Fia suspects her new partner is involved in Roisin Hurley's death, and after a confession from Cian, she cautiously accepts his help.

When her career is threatened due to a series of undue force allegations, DI Fia Lucey is sent back to her hometown of Blackwater to investigate a missing person case.