Lorna Brady is a woman from the Irish town of Kilkinure, who wakes one morning to find a corpse in her house. She has no idea who the dead woman is or if she, herself, might be responsible for the apparent murder.

This is because Lorna has long suffered from extreme bouts of sleepwalking ever since she was incarcerated at the age of 15 in The Kilkinure Convent, a home to one of Ireland's infamous Magdalene Laundries for women. There, Lorna gave birth to her daughter Agnes, who was taken from her and never seen again.

Detective Colman Akande is looking for Lorna for a crime seemingly unrelated to the body she discovered in her home. When he meets Lorna, he finds himself forced to confront his own haunting secrets. As Colman searches for a murderer and Lorna searches for her daughter, their paths collide in ways they never could have anticipated.