There once was a local man who saw a mermaid while fishing from the Cliffs of Moher. He engaged her in conversation and while they were speaking together he noticed, lying on a nearby rock, her magic cloak. This cloak she needed to wear to be able to return to sea. Seeing an opportunity to capture the mermaid, he grabbed the cloak and ran off to his house, where he hid the magical garment.
She followed him to his house to get the cloak back but it was well hidden. She agreed to marry the fisherman and they had a son and daughter. But one day some years later, while her husband was fishing out at sea, she found her cloak. He came home to find her gone, returned to the sea and he and his children never saw her again.