1786, Jerusalem College, Cambridge. A disturbed fellow commoner, Frank Oldershaw, claims he's seen the ghost of murdered Sylvia Whichcote haunting Jerusalem. To salvage her son's reputation, Lady Anne Oldershaw employs John Holdsworth, author of The anatomy of ghosts - a stinging account of why ghosts are mere delusion - to investigate. But Holdsworth's presence in Cambridge disrupts an uneasy status quo in a world of privilege and abuse. And as for Holdsworth himself, haunted by the ghost of Maria, his dead wife - and Elinor, the very-much-alive Master's wife - his fate is sealed. He must find Sylvia's murderer or the hauntings will continue. And no one will leave Jerusalem's claustrophobic confines unchanged.