During a camping excursion, sisters Akane and Kozue find themselves in a horrific situation when they are captured by a group of five men who subject them to abuse and torture. Kozue is savagely killed, but Akane manages to flee. Determined to seek justice, Akane teams up with Misaki, an enigmatic female vigilante, to exact revenge. She is resolute in her mission to ensure that those responsible for her sister’s death face the consequences of their actions.