Yoona and Donghae were in a well-spent relationship until they broke up three months ago. Everything turned from the warm feelings of summer to the dull cold feelings of winter. Everything they once knew disappeared in front of their eyes. Even though the two broke up, it was a bad ending...they still loved each other deep in their hearts. Denial starts, and they start to wonder. The two wonder what's going on in each other lives. Both say they moved on, but they haven't really. They... haven't at all. But then on a random night, they kiss someone from a masquerade party that relives that warm feelings that used to melt their hearts. Who is it? Donghae is determined to find his masked princess, and Yoona waits for that suave guy....but obstacles stand in their way. 

When Donghae thinks he finds her, something happens and his heart drops unexpectedly.

Will he find her?

Will she open her heart to him?