Directed by Ben Cotner and Ryan White, this American documentary follows the legal struggle of two same sex couples to overturn Proposition 8: a controversial measure passed in California in 2008 that repealed the right of same sex couples to marry.

With the help of attorneys Ted Olson and David Boies, who had previously battled each other as lead lawyers in the U.S. Supreme Court case Bush v Gore related to voting irregularities in the 2000 presidential election, the couples brought a federal marriage equality lawsuit against the California ban that ultimately ended up in the Supreme Court.

The Case Against Prop 8 screens tonight and Saturday at 7 p.m. and Friday and Sunday at 9 p.m. I couldn’t find a trailer for the doc but here’s a Q&A with the directors and film editor Kate Amend at the 2014 Sundance Festival where the film picked up a directing award: