Tells the story of two 12-year old girls, who attempted to murder one of their friends in an attempt to appease Slenderman, a fictional monster from a horror website.Tells the story of two 12-year old girls, who attempted to murder one of their friends in an attempt to appease Slenderman, a fictional monster from a horror website.Tells the story of two 12-year old girls, who attempted to murder one of their friends in an attempt to appease Slenderman, a fictional monster from a horror website.