No_Mercy_2019_Korean

The disappearance of her younger sister shatters a woman's life. As she grapples with the silence, she discovers a devastating trail of evidence: her sweet, quiet sister was relentlessly tormented, abused, and sexually assaulted by a clique of students at her school. Consumed by grief and a burning sense of injustice, the woman trades her mourning clothes for a mission, systematically dismantling the lives of the bullies who stole her sister's future.