If this 55-minute show does not go down a complete storm at the Edinburgh Fringe, then I shall be amazed. When I talked to Kate Stanley and Grace Chapman of the Idle Motion physical theatre company for these pages a couple of weeks ago, they impressed me with their ambition and professional know-how. It was impossible to guess just how truly inventive this developed piece was going to be. This group of six former Cherwell School drama students have put together an inspired piece of theatre that left the audience transfixed.

There was a moving and intense plot concerning a flight by a woman on her way to pick up the ashes of her grandmother and scatter them. In parallel, her boyfriend in a recording studio narrated a history of female aviators to a rather bored sound engineer (Nick Pitt and Iggy Jeffrey). But it was the visual impact of The Vanishing Horizon that made the production. The acting space was strewn with suitcases that became, as called for, a telephone booth or a washing basin or a window or, on one occasion, a constellation of stars. They lit up to provide background horizons for tiny planes. And then there were the handbags that turned into flamingos and the tiny halogen torches that three cast members held as the other three darted about with delicate balsa aeroplane models. There was also a balletic quality to the piece, as the four women actors (Kate, Grace, Ellie Simpson and Sophie Cullen) swooped delicately, came to full stops in the shadows or stepped into bright lights as the narrative demanded.

An eminence grise hovered during the three performances at the Cherwell School — Paul Slater, the school’s head of drama who brought the cast members together. He’ll be with Idle Motion in Edinburgh by the time you read this, enjoying their inevitable triumph.