Lee Haeyeon is a third daughter or the youngest in Lee's family Lee Haeyeon different from her sister, Lee Eunyeon and Lee Chaeyeon. Haeyeon more to photography while her sister more to business. That's are the reason why she got arranged with a guy named Park Chanyeol. Their family always find way to make them close and because of the time they spent together, Haeyeon started growth feeling towards Chanyeol. Everything fine until one day, she found out that Chanyeol actually her sister's boyfriend. That made she left heartbroken. Can Haeyeon find her happiness ? Or will she give up ?