“Judy” takes place in 2040, but nobody’s teleporting anywhere. Things look just as they do now, except that the Internet has been replaced by something called the System. When your connection crashes, a technician comes to fix it — that’s quaintly old-school.

But then so is the plot of Max Posner’s new play, about what happens to middle-aged siblings when one of them, Timothy, is dumped by his wife, the unseen Judy. Nobody copes very well, least of all Timothy.

“Judy” is uneven — the play is a collection of delicious little moments that don’t add up to much. But Ken Rus Schmoll’s production for the Page 73 company is as good as can be, and benefits from a fab cast. Danny Wolohan’s Timothy always teeters on the verge of a nervous breakdown, while Deirdre O’Connell and Birgit Huppuch give master classes in low boil as his harried siblings. Posner, just 26, is a playwright to watch, but right now it’s his cast that fully delivers.