A dark fairy tale in a modern Welsh setting. The lives of a diver and a reclusive mermaid collide. Will one be the death of the other?
When Erin comes to the aid of a sea creature caught in fishing nets, she is shocked to discover she's rescued an injured mermaid. Though it quickly disappears back into the ocean, Erin is determined to find the creature again. A twist of circumstance finds her trapped in the mermaid's lair, wrestling with her own conscience and the instinct to survive...