Discovering herself the sufferer of a violent monster assault, Jane launches a vigilante marketing campaign to hunt the beast that attempted to kill her. Jane's efforts intensify, however her troubling historical past of drug use and psychological sickness bubbles to the floor inflicting her household, neighborhood, and authorities to query the authenticity of her account. All of a sudden alone in her struggle, Jane begins to doubt her personal reminiscence of the assault...to doubt if Monster exists in any respect.