Nishizawa Ryoko is a cool-headed, brilliant-minded high school student who aspires to become journalist. On the very first day of the school year, Ryoko's best friend Ogiwara Azusa goes missing all of a sudden and no one can account her whereabouts. Azusa's mother and police immediately starts investigating the case and interviewing students at school. In order to uncover the hidden truth and real reason behind the disappearance of her best friends, Ryoko undertakes her own investigation into the matter. As she digs further and further into her investigation and talking to Azusa's circle of friends, their deep-hidden feelings are revealed and friendships get tested to the brink...

A female student at a prestigious high school goes missing. She had everything including looks, smarts and boyfriend. Her disappearance affects 4 other female students that knew her.