Divorced mother Yoo Rim (Yoo Seon) lives with her teenaged daughter Eun Ah (Nam Bo-Ra), who is having a tough time at her new school. She's got a crush on classmate Jo Han (U-Kiss's Shin Dong Ho), but he turns out to be diverse from that which she expected. He along with endanger her after which his friends rape her. Eun Ah fundamentally takes her own life, devastated and leaving Yoo Rim alone. As minors, his friends and Jo Han really are let off with light punishments. Yoo Rim takes things into her hand to have revenge.