The last memory of love will stay in her mind forever.

Ryoko, a 54-year-old popular novelist, is recently diagnosed with Alzheimer's disease. She decides to write her last book while she is still conscious. One day Ryoko goes for a drink with her students and meets young Korean Chan-he. Charmed by his youth and nihilist-like personality Ryoko feels something special about him. While Ryoko is having a problem with writing, she asks Chan-he to help her writing a new book. She “speaks” her story and Chan-he types the manuscript. As they write a book together, the reality and the story mixed and they fall in love despite their age difference. Yet her disease shows rapid progression, she feels love, anxiety and fear. In her worsening state, she decides to let Chan-he be free.