Ep 18. Love on the Rocks

Nautica, a beautiful mermaid, wants to see the world, but can't because her father has arranged a marriage for her. Discord gives her legs and when she is on land she meets Iolaus II, and they fall in love. But if Nautica doesn't return to the water the water will turn to ice, because when she was born she was given a heart so warm that it warms the water. She is captured and Iolaus II finally finds his courage and goes to save her.