Oliver Driver rakes his fingers through his hair and fixes me with an inquiring gaze as he weighs whether or not to tell me the ending of Belleville, the play he is directing for Silo Theatre. "If I tell you, it can't leave this room but it will help when it comes to writing the story."
So I nod and he does the big reveal which leaves me quite sure I won't tell anyone because to know would indeed spoil it. Then again, even knowing, I'm intrigued to see whether America playwright Amy Herzog can pilot her characters - there are just four in Belleville - to their final destination without it becoming obvious along the way.
Herzog's concern in Belleville is to examine how Generation Y defines and measures success, but the play is not a straight drama. Voted by the New York Times as one of the top 10 plays of last year, it has been described by some critics as suspenseful as any Hitchcock film.
Driver and actors Sophie Henderson, Matt Whelan, Karima Madut and Tawanda Manyimo will play it very much as a psychological thriller with slow-burn twists keeping an audience on edge.
"What we're trying to do is to make it tense and evoke in audiences the same sorts of feelings you get when you are watching a really good thriller; they should be trying to figure out what's really going on here and perhaps fearing for the safety of the characters," says Driver.