A drama about what happens when a couple of lawyers gets divorced.

Lee Ma Ri is a famous actress that is actively pursued by four men. The four men come from different backgrounds and have different aspirations. One is a literature graduate student who dreams of becoming a writer, another is a famous photographer, the third is the heir to a major chaebol family, and the last man chasing after Ma Ri is a young executive who works at a media corporation.

Han Do Kyung, specially scouted by the Incheon Airport Director, willingly accepted 1/3 of the pay she was receiving when working in Singapore to come back to Korea as the chief of operations of Incheon Airport. She speaks five different languages. However, Do Kyung lives with an uneven wound of her family and a regret of leaving her sister behind. She met Kim Ji Sung, a National Intelligence Service agent and gets entangle with him. Kim Ji Sung is very passionate about his work to the extend that he is willing to bend the rules to ensure the security of the country even if he is only acting on his instincts. After being stationed at the airport, he finds himself in an emotional turmoil with a woman he used to love who is also working in the airport. At the same time, he is falling for Han Do Kyung. Kang Ha Joon, a childhood friend of Han Do Kyung is also falling for Do Kyung. Kang Ha Joon is a quick tempered with a habit of talking aggresively due to his nature of work watching over thousands of surveilance cameras in the airport but has good relations with all the airport employees even the cleaners because of his kind personality outside of work. As his friendship develops with Do Kyung, he becomes a strong source of refuge for her. But as his feelings for her grows, his relationship gets more and more complicated with a woman who is his friend, superior at workplace and unrequited love.

Jung-suh and Song-joo grew up together. They were always there for each other. Tragedy begins when Song Joo begins his studies overseas without Jung-suh. Jung-suh's father remarries Tae Mira. Mira takes in her two children from a previous marriage, Tae-hwa and Yuri. Yuri is envious of the life that Jung-suh leads and is determined to take everything away from her, including Song-joo. Tae-hwa begins to develop feelings for his stepsister, however Jung-suh still loves Song-joo. Five years later, tragedy occurs when Jung-suh gets into a car accident causing her to lose her memory. Together with Tae-hwa, they start anew. Song-joo is led to believe that she is dead. However, when they meet again one day, he is determined to remind her of the love they had for one another. When fate finally seemed to be on their side, Jung-suh is diagnosed with eye cancer.

Winter Sonata begins when Joon-sang (Bae Yong Jun) moves to a new high school in search for his biological father. Yu-jin (Choi Ji Woo) and Sang-hyuk (Park Yong Ha) have been close childhood friends; though Sang-hyuk wants to be more than a friend, Yu-jin sees him merely as a brother. On a trip together with some other high school mates, Oh Chelin (Park Sol Mi), Jin-suk (Lee Hye Eun) and Yong-kuk (Ryu Seung Soo), Yu-jin is saved after an accident by Joon-sang and after that they get to be really close and she opens up his cold heart. However, circumstances and fate dictate that their love will never be. He abruptly disappears from their lives.

Ten years later the old High School buddies get together to celebrate Yu-jin and Sang-hyuk's soon to be wedding. Yu-jin who was deeply in love with Joon-sang, still has this fire in her heart for him, even though he's been out of her life for a decade. But at this party Oh Chelin's new boyfriend arrives, and he looks just the same as Joon-sang. Could it be him or is Yu-jin only dreaming?

Young-jun, president of Young-Eum Music, fights the conspiracy of Sungchoon, president of rival company, Victory Records. But he ultimately dies while fighting. Sungchoon and his people cover up Young-jun's death as an accident. Young-jun's wife, Myungja, gives birth to their son, Sung-jae but due to Young-jun's sudden death, she falls into grief. Sungchoon has also been raising his children, Min-chul and Min-ji, alone after his wife's death. He proposes to Myungja and she accepts.In the meantime, at an orphanage, Yeon-soo and Sae-na, two orphans as close as sisters, are preparing for a birthday party for just the two of them. Coincidentally, the president of Victory Records, Sungchoon and his son, Sung-jae, happen to visit the orphanage.Time passes and … Yeon-soo works hard at making a living by teaching art and working at a restaurant. On the Christmas when Yeon-soo and Sae-na promised to meet, Yeon-soo is involved in an unexpected car accident and is unable to keep her promise. From then, they walk separate paths without learning of each other's whereabouts.