A woman struggles to find a job, but she keeps failing. She decides to jump into the Han River to die. The woman is rescued and is sent to the hospital emergency room. There, she hears that she might have a fatal disease and she might not have much time left to live. She barely manages to land a job as a contract worker.
Successful career woman Takanashi Asuka has an old-fashioned dream of getting married and becoming a housewife. After her long-term boyfriend breaks up with her to pursue his own career goals, she encounters Nanami Ryu, a popular newscaster at PTV. Asuka and Ryu get along well, but the last thing he wants is to ever get married. This level-headed pair who want the opposite things in life should never get involved, except Nanami thinks people will lose their freedom once they get married. Moreover, marriage is just an escape place for a woman. "I absolutely don't want to get married," he said. For Asuka, Nanami is an ideal partner, except for his value concerning marriage. And the 'Battle of Value' begins.
Maki Maki (Takako Matsu), Suzume Sebuki (Hikari Mitsushima), Yutaka Iemori (Issei Takahashi) and Tsukasa Beppu (Ryuhei Matsuda) happen to all meet. They form a quartet and begin to live together in Karuizawa during the winter. There is a big hidden secret.
Maki Maki plays the lead violin in the quartet. She has family and only goes to Karuizawa on the weekends for performances. She has a negative personality and barely gives her opinions.
Suzume Sebuki plays the cello in the quartet. She is unemployed. Yutaka Iemori plays the viola in the quartet.
Tsukasa Beppu plays the second violin in the quartet. He comes from a musical family and also works at a donut company. He is the leader of the quartet and provides his grandfather's villa as a base for the quartet. Tsukasa Beppu has secrets.
Kang Han-Kyeol (Lee Hyun-Woo) is a great composer and gets inspired by the voice of others. He hides his identity from other people. Kang Han-Kyeol meets Yoon So-Rim. She is a female high school student with a great voice and she falls in love with him.
When Surgeon Kazuaki Okita (Takuya Kimura) was a rookie doctor, he was kicked out of the hospital due to his friend’s Masao Danjo (Tadanobu Asano) plan. He left for the U.S., leaving behind his girlfriend Mifuyu (Yuko Takeuchi). With his hard work, he became an excellent surgeon.
10 years later, he comes back to Japan by request of Mifuyu’s father, who is a hospital director. Mifuyu is now married to Masao Danjo.
Life for Tetsuo Morita (Sosuke Ikematsu) is not going well and he blows off his anger on gambling, but he keeps losing. At the racetrack, he meets tycoon broker Ginji Hirai. His nickname is Gin-san (Silver) . Tetsuo Morita admires his bad side and his ability to attain huge amounts of money. Tetsuo wants to surpass Ginji and be called Kim-san (Gold). Tetsuo takes a step into the illegal world.
Ranko Ando (Karina) is a detective. She is 32-years-old and single. Ranko Ando does her job well and has solved difficult cases. She doesn't listen to others and doesn't care what others think about her. She works with detective Toshio Aoyama (Shigeaki Kato). He holds a strong sense of justice and cares what others think about him.
Shinichi Sakurai (Sadao Abe) is married to Kanako (Kyoko Fukada) and they have a daughter named Kaori (Mikuu Yamada). Both, Shinichi and Kanako received only a middle school level education. Even though they don't have much money, they are a happy family. At work though, Shinichi experiences effects of only having a middle school education.
One day, Shinichi sees Kaori’s poor score for a national test. He freaks out and decides to improve Kaori's education. Thus, 41-year-old Shinichi begins studying with Kaori and instructs her for the upcoming middle school entrance exam.
Ahn Joong-Hee (Lee Joon) is an actor who used to be a member of an idol group. One day, he appears in front of a family who consists Byun Han-Soo and Na Young-Sil and their 4 children including Hye-Young and Mi-Young (Jung So-Min). Joong-Hee begins to live wth them.
Yoo Ji-Na (Uhm Jung-Hwa) has been a popular singer for the past 20 years, but she holds pain inside because of something she abandoned when she was younger. Meanwhile, Jung Hae-Dang (Ku Hye-Sun) began working as a Yoo Ji-Na impersonator to support her family after her father lost his job. She sings on stage at a club and tries hard to mimic Yoo Ji-Na's songs.