After losing his girlfriend in an accident, three years later Hyun Wook tries to track down her little sister when he finds out she's struggling.

Hyun Wook keeps finding excuses to see Se Na, but there's trouble when the loan sharks are hot on her trail again. ANA is in a bad spot when the President collapses.

After temporarily accepting the position of President, Hyun Wook offers Se Na a position to train as a songwriter at ANA, but Seo Jae Young wants to get rid of both of them as soon as possible.

When Hyun Wook volunteers Se Na for a composition contest between her and Seo Jae Young, she has a hard time finding inspiration.

Hyun Wook is left to pick up the pieces when Seo Jae Yong and the majority of Infinite Power leave ANA without Shi Woo. Se Na works hard on her song despite being ostracized in the company.

Hyun Wook gets Shi Woo to stay with ANA as a solo singer, and the company must work as a team to transform his image. Se Na must re-work her lyrics to match the feelings of a man instead of a woman.

Se Na is let down when her song isn't used for reasons beyond her control. As Hae Yoon notices Hyun Wook and Se Na getting closer, she becomes increasingly jealous.

Shi Woo starts to develop feelings for Se Na and Hyun Wook takes notice. Se Na receives good news about her song.

Jae Young interferes with Shi Woo's solo stage. After their most recent event, Hyun Woo and Se Na are unsure of how to act around each other.

Hyun Wook distances himself from Se Na after she gets fired. Shi Woo hires Se Na to work on a new song for him.

As Shi Woo's song gains popularity, offers start rolling in for Se Na as a songwriter. Hyun Wook is nervous as Seo Jae Young starts mentioning So Eun to Se Na.

Se Na finally discovers the truth about her sister's past relationship with Hyun Wook, and distances herself from him.

With her emotions in disarray, Se Na has trouble composing a new song. To make things worse, Shi Woo accidentally starts his own scandal.

The passing of a good friend brings Se Na and Hyun Wook closer again, but Hyun Wook's father interferes when he finds out who Se Na's older sister is.

Thanks to Se Na, Hyun Wook can finally compose songs again; but Se Na's next decision changes their relationship drastically.