"For me, theatre is above all the place for questions and not for answers. For doubt more than certainty and conviction," once said Florian Zeller. Doubt is certainly his stock in trade.

His signature hat trick of shifting plots, fluid timelines and unreliable narrators has bamboozled and bewildered audiences for close to a decade. But in The Height of the Storm, his greatest puzzle yet, the playwright truly outdoes himself.

André is a troubled figure. He hangs by his window, monosyllabic, seemingly surveying the results of the previous night’s storm on his garden. His adult daughter busies herself around him with chores and small details, trying to coax him into speech – to no avail.

All is not quite what it seems for the formerly renowned author; the past as well as his present have become fluid, and he swings desperately between days which might be connected or which might never have happened at all. Often not sure quite who he is talking to, he is generally genial but prone to bouts of flailing anguish when confronted with something difficult or which doesn’t ‘fit in’ to his 'present'.

The only constant through his freewheeling moods is a pining concern for his wife Madeleine – a rock, anchor and mothering figure to his deeply insecure ego – who may or may not have passed away.

As usual, Florian Zeller doesn't shy away from the hard themes, death and dementia looming large in The Height of the Storm. Nor does he give an inch. Characters and stories change mid-scene, time shifts, inconstancies seep in and questions abound. Is Madeleine a figment of André imagination? Whose life and muddled mind/memories have we stepped into? André's? Madeleine's? None of the above.

Jonathan Pryce is a bundle of contradictions – in turn frightened, mellifluous and charming – as André, a man whose powers of recollection have failed; capturing a deep pathos and outrage in what is an understated but exceptionally memorable performance. Eileen Atkins, Amanda Drew and Anna Madeley shine too as his set-upon wife and daughters, each trying to set his affairs in order and come to term with their own loss – in their own ways.

Moving, confounding and unforgettable, The Height of the Storm is Zeller at his perplexing best. - Marion Sauvebois