Seeking vengeance for his sister Kaoru's suicide, Tezuka Ryou kidnaps three girls he believes were responsible for bullying her. He subjects them to a brutal, live-streamed interrogation on a dark revenge website, using torture and coercion to force a confession regarding the truth behind his sister's tragic end.
The protagonist continues his brutal interrogation of the three women responsible for his sister's suffering in a deserted hospital. Through torture, he discovers that Rina set the fire that killed his father to destroy a diary that would have exposed the bullying. Having extracted the truth, the protagonist decides to eliminate the women and himself in a final, fiery act of vengeance, leaving behind only unrecognizable remains.