Yoona is finally a senior in High School. She's your average teen whose free-spirited who moved to the States after her father passed away and then back to Korea to stay with her brother, Leeteuk.  On the day of their flight, she meets a cute guy, Donghae, and for some reason was drawn to him on first sight,  But what would happen if they meet again?  Their fates are totally a wreck and they must figure something out for their love to be free from secrecy.