If you've seen David Ireland's Cyprus Avenue, which had a sell-out run at the Royal Court a few years ago, you can tell Ulster American is written by the same hand, but it is nonetheless a very different beast.
Both plays look at sectarianism and identity in Northern Ireland, but Ulster American examines it through the lens of two outsiders: An Irish American actor Jay (Woody Harrelson) and an English theatre director Leigh (Andy Serkis).
The ignorance of the two is highlighted by protestant Northern Irish playwright Ruth (Louisa Harland).
But Ruth's presence also exposes their ignorance on a number of other issues. She adds a feminist lens to the narrative and a vehicle through which to examine attitudes towards equality - and sexual violence towards women.
The play is set in the London home of theatre director Leigh (Andy Serkis), the day before rehearsals begin on Ruth's violent new play set in Northern Ireland.
Jay, a Hollywood star, is playing the lead, and his lack of understanding of the play's subject matter and its historical context is problematic.
Leigh's only concern is keeping him on board, particularly with the promise of a Broadway run. He would rather change the play than lose the star.
But Ruth won't pander to Jay and Leigh's ignorance and prejudices and refuses to change a word of the play.