An engagement party is taking place for Mr Richard Montague, son of wealthy landowner Sir Edgar Montague, and his fiancee Catherine. During a dance with his beloved, a strange thing happens: a man appears at Richard's shoulder and appears to communicate something to him without saying a word. Instantly breaking off the engagement, he rushes off to speak to his father, never to be seen again. Distraught with worry, Catherine sends for her spinster aunt, Miss Dido Kent, who has a penchant for solving mysteries. Catherine pleads with her to find her fiance and to discover the truth behind his disappearance. It's going to take a lot of logical thinking to untangle the complex threads of this multi-layered mystery, and Miss Dido Kent is just the woman to do it.

    Europe is modernizing, and the sultan of the Ottoman Empire feels he has no choice but to follow suit. But just as he's poised to announce sweeping political change, a wave of murders threatens the fragile balance of power in his court. Who is behind the killings? Deep in the Abode of Felicity, the most forbidden district of Topkapi Palace, the sultan - ruler of the Black Sea and the White, ruler of Rumelia and Mingrelia, lord of Anatolia and Ionia, Romania and Macedonia, Protector of the Holy Cities, steely rider through the realms of bliss - announces, "Send for Yashim." Leading us through the palace's luxurious seraglios and Istanbul's teeming streets, Yashim places together the clues. He is not alone. He depends on the wisdom of a dyspeptic Polish ambassador, a transsexual dancer, and the Creole-born queen mother. He manages to find sweet salvation in the arms of another man's wife (this is not your everyday eunuch!). And he introduces us to the Janissaries. For four hundred years, they were the empire's elite soldiers. But they grew too powerful, and ten years earlier the sultan had them crushed. Are the Janissaries staging a brutal comeback? And if they are, how can they be stopped without throwing Istanbul into political chaos?

    Until he's murdered, that is. The case seems open and shut: when Aslan was killed he was inside a locked room with only five other people, one of whom has already confessed to the murder. Detective Inspector Richard Poole is hot, bothered, and fed up with talking to witnesses who'd rather discuss his 'aura' than their whereabouts at the time of the murder. But he also knows that the facts of the case don't quite stack up. In fact, he's convinced that the person who's just confessed to the murder is the one person who couldn’t have done it. Determined to track down the real killer, DI Poole is soon on the trail, and no stone will be left unturned.