It's 1964. The United States is in the fearful shadow of the McCarthy hearings. Homophobia and antisemitism are everywhere. And in a Broadway rehearsal room, the brilliant, battling artists Zero Mostel and Hal Prince must work together to create what will become one of the great American musicals, Fiddler on the Roof. How can they collaborate if they can't stand each other? And what is the true cost of creating a masterpiece?