Selkie

When Kathleen Flynn's partner, Anna, mysteriously vanishes while swimming along the Irish coast one day, her brother Niall and niece Caitlin immediately shift into action to find her. Has Anna chosen simply to abandon her long-time companion, or has she met with foul play? The Flynns' friends from the underground enclave of Hamelyn and the world of Faerie join in to help uncover the reasons behind Anna's disappearance, while at the same time a far more sinister team is forming - one which doesn't have the Flynns' best interests at heart....