For the past year, she's been dating Nam Ha-jin (Sung Joon), a plastic surgeon with a sweet and gentle personality.

But Yeo-reum's peaceful existence is shaken when her ex-boyfriend Kang Tae-ha (Eric Mun) suddenly reappears in her life.

The CEO of an interior design company, Tae-ha is a smart, confident man with a strong competitive edge who always gets what he wants.

Meanwhile, Ha-jin comes across Ahn Ah-rim (Yoon Jin-yi), whom he recognizes as the girl he treated like a sister when they were both children living in an orphanage.

As she begins working with Tae-ha, Yeo-reum is forced to re-evaluate her romantic history, which sets her off on a search for true love.