Christmas Eve.

Bettina and her husband Albert aren't happy.

Bettina's mother is staying for the holidays.

Which is awkward.

Not least because Bettina's mother met a man on the train.

And now she's invited him around for drinks...

Family, betrayal and the inescapable presence of the past reverberate through the UK premiere of Roland Schimmelpfennig's razor-sharp comedy.