Idol School is a reality girl group survival show. The program aims to form a 9 members girl group out of 41 female participants, training them in singing and dancing in the span of 11 weeks.

Yeon Woo grew up happy in a loving family. One day, her father had died mysteriously, and her mother remarried a man who was 10 years younger than her. Misfortunes never come singly. Her mother died of Wilson’s disease and her step-father ran away with money. Min Ho, an old friend of hers, is always there to comforther. Min Ho decided to be a policeman to catch a murderer who killed Yeon Woo’s father. Eun Sup came back to Korea with the sole purpose of stopping his lover Soo Ah from getting married, but Soo Ah gave him an outright denial. To make matter wose, his father sent people over to his hotel to catch him. He ran away from the hotel and he accidentally fell into the subway track and became unconscious. Yeon Woo saw the whole scene in the platform and saved his life. Eun Sup asked her if he could stay in her place temporarily since he had no place to go. So Yeon Woo, Min Ho and Eun Sup all started living in a same house.

Based on a famous tale of Korean folklore story about a princess of Nak Rang of Nangnang Kingdom and Prince Hodong of the Goguryeo Kingdom.

A lot of stories unfold when Ms. Ma, a cold-hearted witch, becomes a homeroom teacher at an elementary school.

Na Rim, who came from a wealthy household, lost her family in a car accident when she was nine. After the accident, she suffered from amnesia so her uncle hired Oh Dal Gun, an ex-ganster, to recreate a similar household with parents, sister, brother, grandparents and uncle in hopes that she would regain her memory. In a hurry, Oh Dal Gun ended up hiring all sorts of odd ball characters to act as members of Na Rim's family. None got along at the start and hilarious situation arose when all members tried to cope in front of the little girl and also to protect her from the one who caused her family's accident. Eventually they started to behave like a real family and cared for each other, proving that blood relation is not as important as a caring heart.