Taking viewers deep inside the notorious "Inner Circle" that promoted murder, suicide and church burning in the Norwegian black metal subculture of the 1990s, filmmakers Aaron Aites and Audrey Ewell offer up a nuanced and fascinating documentary. Rare footage and interviews with musicians -- including Gylve "Fenriz" Nagell, Varg "Count Grishnackh" Vikernes and Jan Axel "Hellhammer" Blomberg -- shed light on the controversial movement.