But while Young, one of New York’s most fascinating stage actors, is enrapturing in the first scene, that is by far the high point of this tantalizingly tricky play. Braun, seeming subdued and less than comfortable in the role, does not match her, and the show overall is too often curiously flat. Neither its sometimes pitch-black sense of humor nor its characters’ bond and brokenness are fully realized. The synergy isn’t there, at least not yet; that might come with time.