John Stuart doesn't really have much to do in this rather routine, gently comedic, haunted house mystery. His "Brooks" character finds himself trying to identify a phantom that inhabits an old monastery and who has an habit of terrifying - or worse - the other occupants. Those range from the upper class nitwits to the loved-up servants - and he has to get a move on before there is no-one left to help discover who's up to all of this mischief and why? It's all a bit too verbal, and at just under the hour, there is still quite a fair degree of padding too. It's still watchable enough if you like an early example of a British-made thriller that uses the gloominess of the scenario and a minimum of wattage to help present the thinnest of stories in quite an eerie style.