A romantic comedy about two past acquaintances who meet again after they went through reversal fortunes and appearances.
Kim Hye Jin (Hwang Jung Eum) was a very pretty girl from a rich family. After her family’s publishing company went bankrupt and her father died, she experienced hardships and then lost her beauty too. Meanwhile, Ji Sung Joon (Park Seo Joon) was an unattractive boy with low self-esteem, but grows up as a handsome man and successful editor.
What happens when the “sister” you grow up with at an orphanage ends up taking your life and becoming your biggest professional rival?
Geum Sa Wol (Baek Jin Hee) and Oh Hye Sang (Park Se Young) arrived at an orphanage on the same day and grew up like close sisters. But Hye Sang is adopted by Oh Min Ho (Park Sang Won) and Han Ji Hye (Do Ji Won) and ends up living a very comfortable life. But things get complicated because Min Ho’s first love, Shin Deuk Yee (Jun In Hwa), who happens to be Ji Hye’s best friend, secretly gave birth to his daughter, but the baby girl was accidentally switched at the hospital with another baby. Deuk Yee ends up marrying Kang Man Hoo (Son Chang Min), the family driver who throws away his first wife, Choi Ma Ri (Kim Hee Jung), to have a better life with Deuk Yee. Ma Ri becomes a mistress in Man Hoo’s new life but her son, Kang Chan Bin (Yoon Hyun Min), is raised as the legal son of Deuk Ye. While Chan Bin tries his hardest to be the dutiful son, Joo Se Hoon (Do Sang Woo), the son of a moneylender, is the opposite, trying to escape the life that his father created for him. When the truth comes out about Sa Wol and Hye Sang, can the two former orphanage sisters find their true place in life?
The story revolves around a 38 years old housewife, Ha No Ra (Choi Ji Woo), who decided to go back to school and experience the college life for the first time. She spent the last two decades as a housewife after she got married and became a mother at the age of 19 years old. Her 20 years old son, Kim Min Soo (Kim Min Jae) and his girlfriend, Oh Hye Mi (Son Na Eun) are her classmate, while her husband, Kim Woo Chul (Choi Won Young) and her first love, Cha Hyun Suk (Lee Sang Yoon) are the professors in that college.
Yoon Jung Ae (Cha Hwa Yun) raised her 4 kids by herself. Now, her kid already grown up but none of them really care about her.
Detective Cheo Yong (Oh Ji Ho) uses his abilities to interact with spirits to solve cases.
Do Hae Kang (Kim Hyun Joo) involved in a mysterious car accident. Due to this car accident, she loses her memory and falls in love with her husband, Choi Jin Uhn (Ji Jin Hee) whom she hated again. She then meets her separated twin sister Dokgo Yong Ki for the first time in 30 years.
Oh In Yeong is a former idol group singer. She belonged to a popular 4 member girl group, but, now, she isn't very popular anymore. In order to boost her flagging popularity, In Yeong agrees to appear in a television reality show that pairs up fake mothers- and daughters-in-law. While filming for the TV show, she meets her scripted mother-in-law Yang Chun Ja, a matriarch of a long-standing traditional clan. They end up hating each other on the show, but as fate would have it, the two later end up becoming mother and daughter-in-law for real.