Cheon beoneul bulreodo

High schooler Ha-Na struggles with insomnia following the suicide of her classmate Jin-A. During her sleepless nights, she witnesses her parents arguing, only for them to pretend everything is normal the next day. Ha-Na is frustrated by their insincere behavior. Meanwhile, Se-Mi, an upperclassman from the band club, reaches out to her. Ha-Na starts behaving in new ways but soon regrets her actions. As a rumor circulates about her, she finds herself being bullied.