Through financial necessity William Chettham has sold his ancestral home to university contemporary and entrepreneur Jack Filby, whilst he and his mother, wife and son Freddy live in the dower house. On the night a burglar known as the Creeper is robbing the Chief Constable, the Chetthams are celebrating Freddy's birthday with guests numbering the local doctor and writer David Roper - who made his name ghosting the biography of ex-crook Harry Godbolt.
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