Inside a national weather service, love proves just as difficult to predict as rain or shine for a diligent forecaster and her free-spirited co-worker.

Ex-couples who broke up for various reasons gather to look back on their past love and to find new love.

Song Geurim is a radio program writer who isn't exactly talented in writing. She's got the passion, initiative, and drive, but due to her lack of writing skills, she still remains an assistant writer. When she was young, the radio was the only thing in the world that she could share with her blind mother. She was consoled by the sounds of the radio and loved it more than anything, so she became a writer. When her radio program is on the verge of cancellation, she succeeds in casting a top actor Ji Suho, who can't do anything without a script.

Hong Hara is a bright, energetic girl with a positive outlook on life. She is a sweet girl who believes that every time she falls in love, it would last forever. Hong Hara is in a relationship with No Cheol, a man no one cannot seem to resist, though he is not mature all the time. He is also the ex-boyfriend of Do Ra Hee, a girl who has spent the last ten years in the fashion business. After dating No Cheol for six years, she is now sick of men and her number one goal is to gain more money. Somehow Hong Hara ends up living and working with Do Ra Hee. The two women decide to launch their own online shopping mall. After struggling to make a living at the fast fashion mecca of Korea, Dongdaemun, they realize the potential in online shopping malls. However, the industry is filled with competitors, and the business partners soon learn about the challenges of running a small business.