Under Saxa's spell, Magne continues to fall further from himself - a perfect distraction for Fjor to enact his vicious plan and set a dangerous trap.

Erin scrambles to erase evidence of her actions, pulling her deeper into danger. Harper grows increasingly suspicious of her.

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.

Retracing her steps, Lorna realises that the mysterious woman could be linked to her past in the town's Magdalene Laundry. She may even hold the answer to the question Lorna has long craved: what happened to her child? Fearing her sleepwalking escapades, Lorna tries to keep herself awake whilst seeking out the truth.

Meanwhile, in Dublin, detective Colman Akande is confronted with the murder of a local priest. Tracking the case brings him across the country and into Lorna's orbit.

An untimely death leads Merlin to locate Arthur and urge him to come back to Britain; chaos ensues when Gundleus assaults Avalon.