When a spiritual medium is murdered in a locked hut on a haunted estate, Sir Henry Merrivale seeks a logical solution to a ghostly crime Plague Court is old and crumbling, long neglected after its lord, hangman's assistant Louis Playge, fell victim to the black death hundreds of years before. Famously haunted by Playge's ghost, the property finally has a new owner and banishing the spirit is the first order of business. And when the medium employed...