Interesting story, only too long... Legend of the blue sea is about a mermaid who fells in love with a con man, after meeting him in Spain, and decides to find him in Seoul. However, she had erased his memory beforehand and so he can't remember her. Meanwhile, the drama shows the love story between the two main characters in a different era and how they have now reincarnated into the present lovers. I divide this drama into three parts, the first one which is the interesting one, the second one which is the romantic one and the last one that was kind of boring and more family drama like. The plus points for this drama are the performances, especially from the leading lady. She was really good and funny pretending to be a creature from the sea learning the human behaviour and way of living. The chemistry, however, between the two leads was weak...The family drama was interesting and the step mother\villain was really the ideal villain type that you want to see behind bars. Of course, when the family drama started progressing, the romance and the mermaid affairs got the second lead. And though it was entertaining, the last few episodes could have been combined into one and that would have made this drama perfect. However, they just prolonged the story by adding constant flash backs again and again which was tiring. So, 4 out of 10.