Kim Sohyun woke up with no recollection of the past six months. The only people she could trust are her uncle, Kim Minho, and a man named Jung Sungjae, who claims to be her boyfriend. However, this man, Jung Sungjae has a secret that no one knows. As soon as Sohyun finds out, she is unprepared for what is to come. He may be the very reason for her lost memories, but little does she know the dangers of remembering it all.