As Bang Yongguk and Choi Yujin's One Hundred days are coming up, Yongguk was going to surprise her with a kiss where they had their first date. Namsan Tower. But tragedy strikes when Yujin gets into an accident that claims her life. As she goes into Heaven she still has feelings for Yongguk and wants to comfort him seeing how he is in a state of lost. Will she be able to comeback to help him?