It is the mid-1930s in the English village of Vale Thorn. Sir James Ravenwood, a collector of macabre artefacts and an expert in the occult, is hosting a weekend party at his country house, Warlock's Gate, in order to celebrate the unveiling of his latest treasure-a ceremonial dagger said once to have slain a vampire. Amongst the invited guests is a rival collector, Sebastian Lynch, a man who has been receiving strange threats against his life,...