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Ireland, 2015. When Lorna Brady wakes to find a corpse in her house, she has no idea who the dead woman is or if she's responsible for the apparent murder.

Lorna has no intention of sleeping until she finds out what Aoife Cassidy knew. The town's laundry survivors are campaigning for justice. Past betrayals emerge to the surface and end in tragedy.

A new lead means Lorna might finally discover the fate of her daughter, but Colman is closing in. The case takes an unexpected turn.

Lorna uncovers more horrors at the convent. In Dublin, Colman delves into his own past and discovers the source of his nightmares. A new lead cracks open the case.

Lorna and Colman become unusual allies when in pursuit of the truth. The survivors receive life-changing news. A fresh suspect emerges in the murder case.

Aoife Cassidy's past reveals answers in the present. Colman closes in on his suspects. But will Lorna find peace at last?