Sa Rang and Jung Yul are identical twin sisters who couldn't be more different. One is sweet and introspective, while the other is a manipulative harpy. Nan Soo and Yoo Shin are best friends and teammates who aren't that much alike, either. One is a hot-headed jock while the other is an intelligent pessimist. When love comes to town, the lives of these four teens are turned upside down.

Eumpa Won (One) is an awkward, quiet music student and former child prodigy who is now determined to lead his life as a normal guy. Destiny throws him a curve as he finds himself caught up in an unlikely love triangle. Enter Jenny, the highly acclaimed singer, and Young-Ju, the plain Jane. These seemingly opposite personalities are drawn together by two common bonds... Their passion for music and their search for true self-identity.

Woojae is desperate to take Eumpa under his wing - but is Eumpa ready for Woojae's leadership? Meanwhile, Jenny's work performance suffers from her insecurities. Can she overcome her slump?

In the music entertainment business, where everything is already a copy of a copy, what does it mean to be accused of plagiarism? Woojae reveals that O.N.E.'s new single, "Jammer," is a rip-off of a German band's song and throws the music industry into uproar. A press conference is called, but will it be enough to save the group from a devastating break-up?

Eumpa turns a deaf ear to the music world, even as Jenny urges him to kick out the jams. But when Eumpa's teacher admits that he stole his student's music, the music industry sings a different tune toward Eumpa. And things just might go from a minor key to a major chord when Jenny's record company turns her into a sexy pop icon. Will the girl gone wild break Eumpa out of his hard rock shell?

When Jihae Han signs Eumpa's recording contract as his legal guardian, it causes a huge controversy. What's the true nature of their relationship? And will this endanger Eumpa's exploding career?

Eumpa's strange and unpredictable personality makes him a hit with those around him. After playing matchmaker and a confidant to Yunjin, Eumpa now eyes the top spot on the charts. However fame comes at a steep price as pride, true ambitions, and friendships are thrown aside, as told by Sonya. Along his way to stardom, Eumpa vows never to forget his first love, Youngju... but will his loyalty to her rekindle an old flame and spark jealousy in others?

Eumpa wins the #1 spot, but it may not be what he seems. With Ha Rock injured, Jenny wrapped in scandal and lawsuit that Sonya is dealing with the win sends ripples through the management. But all that is nothing compared to what is going to rock their love lives.

Everyone knows about the story of Shahrazad and her wonderful tales of the Arabian nights. For one thousand and one nights, she entertained the mad Sultan with the adventures of Aladdin, Ali Baba, Sinbad, genies, and many other mystical creatures. But what if Shahrazad was actually a boy desperate to save his sister's life? What kind of strange things would he do to make sure that he survives to tell the tale?

It's the second night, and Shahrazad tells yet another story to save his own life from the mad sultan. This time, it's a tragic love story between a beauty from an exotic Eastern kingdom and a slave, who's from a far away western kingdom.

The most beautiful queen ever, who ruled and destroyed the hero, Cleopatra... Her name will be remembered eternally among those who loved her and even more among those who hated her. On the third night, Shahrazad tells the extraordinary story of the beloved - yet tragic - queen, Cleopatra.

Sehara meets Sultan Shazaman and discovers that his brother's distrust of women not only comes from Fatima's betrayal but also his mother's traumatic death. And while Sehara is away, Shahryar continues to play his dangerous game with another girl. Will Sehara's next night story be enough to stop the sultan's wicked ways?