Alex Gibney has relayed shocking stories about the US torture regime and the fall of Enron, but with Mea Maxima Culpa: Silence in the House of God, he turns his documentary cameras on a massive cover up within the walls of the Catholic Church.

Obviously a highly charged subject, the movie focuses on the first known protest against clerical sexual abuse stemming from a priest who molested hundreds of deaf children over a span of several decades.

It was one of our 12 Best Docs of 2012, and with its release on HBO this coming Monday (February 4th, 9pm ET/11pm PT), it’s a good time to take a look at the trailer for a movie that’s undoubtedly difficult to watch: