Although seven clowns started the evening alive, only six of them still breathed by the evening's end. And while everyone saw the murderer and knew the murderer, no one knew their name.A masked Halloween party at a haunted Elizabethan mansion for clients and counsellors of a new psychotherapy practice ends in gruesome murder ... it could only happen in the bleak seaside town of Stormhaven.Once again, retired monk Abbot Peter and his irascible niece DI Tamsin Shah are called upon to solve the mystery. The answers are to be found in the mystical writings of a 14th-century Persian poet.