Beautiful Little Fools is the debut production from all-female company Optic Theatre – and it’s clear they mean business. Intense, brutal and with a conclusion that’s genuinely quite traumatic, the show takes an everyday situation to the ultimate horrifying extreme, showing what human beings are capable of when exposed to a relentless stream of hatred and lies.

Three young women wake up in a room, with no idea of how they got there or even who they are. There’s no way of leaving, and each of them is wearing an electric ankle bracelet that delivers a painful shock every time they step out of line. Every day they’re forced to listen to disembodied voices – which we recognise as those of public figures including Margaret Thatcher and Donald Trump – discussing the danger posed by immigrants. And then a new girl arrives…

I’d love to say this story is far-fetched – and of course it is, in the sense that the British government doesn’t really have bunkers full of terrified prisoners who are being slowly radicalised (or at least let’s hope not). But the way in which the girls are manipulated in their torture chamber/Big Brother house is unnervingly familiar, and with people like Katie Hopkins advocating “final solutions” in the mainstream media, the play’s shocking climax doesn’t seem like such a wild stretch of the imagination.

Anna Marshall’s production successfully depicts the passing of time (though exactly how much is hard to tell), with movement sequences between scenes that demonstrate the captives’ mind-numbing routine. Each time we come back to them, they’ve lost a little more of their humanity, as they play mind games, form alliances and turn on each other in their desperation to survive the ordeal. In 60 gripping minutes, Jemma Burgess (who also wrote the play), Sophia Hannides, Isabel Goldby-Briggs and Jessica Collins take us on a rollercoaster ride through shock, fear, anger, hysteria and hatred – but also some deeply moving moments of vulnerability that remind us these young women are human beings just like us, whatever they may find themselves driven to do.

The play unflinchingly exposes its audience to the same treatment as its characters. We listen to the same abhorrent recordings at least three or four times, and endure flashing lights, high-pitched tones and crackling electricity (courtesy of sound designers Dan Bottomley and Davide Vox). It’s deeply unsettling, even for just an hour, and makes it easy to believe that after days, weeks or even months of this treatment, the girls might be willing to do just about anything to gain their freedom.

Beautiful Little Fools is an exciting debut from Optic Theatre, a thrilling and disquieting reminder of the power of words to change hearts and minds, for better and for worse. It would perhaps have been easy to dismiss as impossible a couple of years ago – but with hate crimes on the rise, Brexit going ahead and Trump in the White House, the play is not only timely; it’s terrifying.