The Bellwood is an idyllic new suburban housing estate, built on the site of an old stately home. But a spate of sudden deaths has recently begun to blight life on the Bellwood - and while the deaths all appear to be of natural causes, the fact that the unfortunate victims appear to have expired of sheer fright is a cause of grave concern for local police, as well as for the estate's residents. Who is terrorising the Bellwood? Who is hiding behind the terrifying green mask that haunts its gardens and streets at night? And what could possibly be the motive for this bizarre turn of events?

Originally published in 1940, this is a vintage mystery thriller from the golden age of British crime fiction.