Surprised by her latest find, Colette travels to the hospital where Stacey worked to speak with those who knew her, in the hopes of understanding her daughter.

After a visit from organised crime, Collette is more suspicious than ever about Stacey's supposed suicide and pieces together clues that point to a culprit.

After a tense confrontation, Colette becomes convinced that Stacey was murdered, but she still needs evidence to prove it her suspicions.

Colette follows up on a case that leads her into contact with someone who knew Stacey, which results in a new lead - Stacey's last call.

With a suspect in her sights, Colette closes in on the truth; with Patrick and Siobhán's help, Colette finally discovers corroborating evidence.