Final answer:
The 'A Punk Prayer' documentary is about the Russian group and their controversial performance in a Moscow cathedral in 2012, leading to their arrest and highlighting issues of freedom of expression in Russia.
Step-by-step explanation:
The documentary film 'A Punk Prayer' is about the Russian group , a feminist punk rock protest group known for their provocative and politically charged performances. The film focuses on a specific incident in 2012 when members of the group staged a performance inside Moscow's Cathedral of Christ the Savior, which resulted in their arrest and subsequent trial for 'hooliganism motivated by religious hatred.' The documentary provides insight into the members' motivations, their legal struggles, and the wider implications of their actions on Russian society and freedom of expression.