This has been a gruelling week for being trapped in small theatres with bad plays.

Hard on the heels of Kali Theatre’s leaden comedy, Another Paradise, at the Belgrade comes this piece of impenetrable pretentiousness devised by Unlimited Theatre.

A man is dissuaded from committing suicide in the Firth of Forth by a stranger who takes him home to the pub he runs with his partner. At first, it seems that the couple are motivated by altruism, but things take a sinister turn when the man finds himself manacled to the wall in their beer cellar. It seems he is to be the subject of some kind of socio-psychological experiment.

He is visited by a ghost who might either be the moon or his dead wife, depending on whether she speaks with an English or Scottish accent. Disconcertingly, she also sings to him with a striking lack of skill. And that’s pretty much it, except that it manages a gruesome theatrical surprise near the end, which would be very impressive it were part of some more coherent whole. At barely 80 minutes, it feels a long haul, demonstrating the difference between subjective and objective time.

* Running time: 1hr 20 mins (no interval). Until Saturday.