The presidents daughter, Yoon Jae-Hee (Jun Do-Yeon) is living in Prague working as an official in the consulate under foreign affairs. Choi Sang-Hyun (Kim Joo-Hyuk) is a detective who goes to Prague in order to look for his girlfriend, Hye-Joo (Yoon Se-Ah). Sang-Hyun who loves Hye-Joo very much has been paying for Hye-Joo's tuition, and was planning to marry her in the future. However one day, after San-Hyun receives the presidential letter of commendation, Hye-Joo (who is in Prague) tells Sang-Hyun never to look for her again. Sang-Hyun ends up going to Prague to find Hye-Joo. San-Hyun meets Jae-Hee and misunderstandings arrive between them. Sang-Hyun ends up thinking Jae-Hee is a prostitute but later asks her to help him translate when he gets into a little problem with a pick-pocketer. Coincidentally, Jae-Hee's roommate is Hye-Joo. Later, Sang Hyun learns that she is pregnant with another man's baby. Hye-Joo tells Sang-Hyun she loves the other man even he is much older because is wealthy. Ji Yonh-Woo(Kim Min-Joon) is from a prominent family, he was Jae-Hee's former boyfriend, but had left her due to his own reasons, and still harbors feelings for her.

Everyone deserves a chance to follow his or her dreams. Hyeok-Ju (Ji Hyeon-Woo, Golden Apple) is a rebel who can't help but start trouble and the only thing that stands between him and a life of crime is his desires to one day make it as a singer. While pursing his goal, he meets Hee-Su (Kim Ok Bin, Hello God), a charming and beautiful runaway who longs to become a dancer. The two become friends and work together to make their passion for music and dance a reality. But when Hee-Su meets Lex (Hwan-Hee), an arrogant and promising young entertainer, she believes her dreams may have come true. Over the Rainbow is the story of three young people's journey into the crazy world of stardom. With nothing to lose, but everything to gain, will they be able to survive the cutthroat world of entertainment?

Shin (Joo Ji-Hoon) may be the picture-perfect Crown Prince, but he is aloof and wary of his royal status. Commoner Chae-Kyung (Yoon Eun-Hye) is headstrong and outspoken, but fiercely loyal to her loved ones. Their worlds unexpectedly collide when an arranged marriage makes them husband and wife! It's not exactly "happily ever after" for this royal odd couple as they try to make sense of their relationship. Life gets even more complicated when Prince Yool (Kim Jeong-Hoon) returns to the palace to compete for both Chae-Kyung's affection and the throne.