This chilling, fascinating documentary is the follow-up to Japanese director Tatsuya Mori's film A, about the poison gas attack by the Aum Shinrikyo cult on the Tokyo subways that killed hundreds of civilians. In A2, a more expansive but equally thoughtful and provocative film, Mori focuses on the trial of the Aum leader Shoko Asahara, as well as the struggles of the cult's remaining members to make sense of it all.