Kim Taeyeon  has everything that everyone has ever wanted. From being a successful doctor and a daughter of a rich and powerful man and living in a perfect life with a perfect family. She has nothing to ask for anymore.

But one day her perfect life became imperfect. Her so called "perfect family" was ruined when Tiffany, his father's mistress, entered their life.

She tried to let Tiffany out of their life and bring her family back. But everything went ironical. As she tried pushes her away, she became closer to her especially when  she found out that Tiffany has a fatal illness.

At first, Taeyeon, with a heart of a doctor does only her job to help Tiffany as her patient. But as time went by she learned a lot about Tiffany's sorrowful life. She forgave Tiffany, her treatment to her as a patient changes to a sisterly love and care.

Tiffany had never felt this kind of love that Taeyeon is giving to her. All these years she was thirsty of love, she lived in a life where no one gives her and let her feel what true love is.Now that someone did, she doesn't want to let go of it even thou she knows its wrong because both of them are woman and its selfish because Taeyeon is engaged to a man and if she continues to love her and to make Taeyeon love her. Taeyeon's reputation will be destroyed.But she blinded herself to these instances and chose to be selfish because of her love to Taeyeon. She begged to Taeyeon to love her back even just for the remaining days of her life.

But will Taeyeon accept Tiffany's plead?