A series of romantic events and exciting situations in this romantic series. The story of the series is told when a child named Kim Dam Reung drowned in the sea, rescued by a mermaid named Si-hwa. The relationship between them became strong and everything between them became a manifest love. When Si-hwa heard one day that Kim's family wanted to marry another girl, Si-hwa was shocked by this bad news and decided to erase all her memories and love for you. He returns to stand beside them to live a deep love story, the most romantic story.