This is the second time I wrote a review for a drama and I really hope this is helpful for you guys... ..If you want to watch a drama, I really recommend this. I really like this because the story is good and Yoona is the main cast which is my bias..by the way..back to the story.. . At 1st to 4th episode, you might find it boring because their theme their was 1970's, but if you continue watching it..you're going to find it really good.. In 1970's Seo In Ha(jang geun suk)and Kim Yoon Hee fell in love with each other when they were still in college but they didn't have the chance to be a lover because Lee Dong Wook(kim shii hoo), Seo In Ha's best friend also like Kim Yoon Hee. Few days later, Kim Yoon Hee went to America where born her daughter, Jung Ha Na(yoona)and in 20 years later, Jung Ha Na went to korea where she met Seo Jun, Seo In Ha's son and they also fell in love with each other...at first it was hate but then it change to LOVE..... ..you should watch this people....AGAIN..i hope this is helpful to you guys!!!