Byun Kana has her life going as it is until one day, she wakes up not knowing anything. Even her own identity. What would losing your own memories be like for a person like her? Feeling blank and not knowing anything. She then meets her brother Byun Baekhyun and takes her back to where she belongs, meeting Park Chanyeol and a child named Soah. Kana resumes her life as "Byun Kana" with Chanyeol and the others by her side. She then develops feelings for Chanyeol without even knowing what it is that Chanyeol is keeping from her. But will she really play the role of Byun Kana not knowing who she really is? Will Kana remember how she is before she lost her memory? Will she remember something important or will she remember something that can only hurt her if she remembers?