On one level, Lemon is a tale about the aftermath when 19-year old Kim Hae On, a breathtaking beauty, is found with her head bashed in in the local park in the summer of 2002. Told from the perspectives of her sister, Da-On, and two of Hae-On's classmates, Yun Taerim and Sanghui, Lemon shows how these characters, in their own way, grapple with Hae-On's murder and their own (unreliable) recollections of the circumstances surrounding her death. On another level, Lemon is a crime novel, where the crime in question isn't Hae-On's murder but was precipitated by her death. I confess I almost missed it and when I did see it, was blown away. You can also read this book as a commentary on gender and class inequality.