Young Joo is a member of the national female curling team. She begins to experience ringing in her ears and this causes her to become a substitute player. Young Joo travels back to her hometown. There, she meets Sung Chan. Young Joo had a crush on him in the past. Sung Chan is a former member of the national male curling team. They become partners in mixed doubles curling.

In 2008, Hyun Soo and Seung Yun meet as first year students at their university's library. They join the chorus club together and build good memories together for a year. 10 years later, they meet again on the subway.

Oh Eun Soo is a university student. Her mother has divorced twice and Oh Eun Soo learns that her mother will marry again. Oh Eun Soo isn't happy about her mother's third marriage.

Story follows people, including Ji Wook, who escape into dreams to forget the pain of reality. Ji Wook is a detective with excellent memory abilities.

Bae Sang Hee is a novelist. He is having a hard time finishing his second novel. His long time girlfriend is Jung Yi Na. She works as an editor for a publishing company. Bae Sang Hee agonizes over his work and his love life.

Miss Kim is a mysterious contract worker at a company. She keeps a low profile at work, but she is smart and has an excellent memory. Mr. Lee is an enthusiastic rookie employee at the company. He always seems to be near Miss Kim.

Yang Hee is a stage drama director. She gets tired from tough situations around her. One day, she meets Pil Yong. They haven't seen each other in 19 years, when they attended the same university. Soon, Yang Hee's life changes.

Kang Hyun Ho has never had a boyfriend in her life. She begins swimming lessons at a sports center. There, she develops a crush on Jo Woo Jin. Meanwhile, Han Yoo Ra is Kang Hyun Ho's swimming instructor. He develops feelings for her

Eun Jae has studied to become a police officer for the past 5 years, but she has a hard time due to failing her exam. Joon Ki has been studying to become a public servant for the past 8 years. He is proud of his younger brother Yoon Ki who works as a reporter. One day, Eun Jae hears a woman screaming

Do Do Hye is a math teacher. She has a personality that is too honest at times and this causes her to face embarrassing moments. Whenever she has one of those embarrassing moments, she writes down in her wrong answer notes and reflects on herself.

Do Do Hye goes to a camp for writing college entrance exam questions. There, she meets two men with whom she had embarrassing moments with in the past.