As India celebrates the arrival of a momentous new decade, Inspector Persis Wadia stands vigil in the basement of Malabar House, home to the city's most unwanted unit of police officers. Six months after joining the force she remains India's first female police detective, mistrusted, sidelined and now consigned to the midnight shift. And so, when the phone rings to report the murder of prominent English diplomat Sir James Herriot, the country's most sensational case falls into her lap.

1936 in the Crown Colony of Singapore, and the British abdication crisis and rising Japanese threat seem very far away. When the Irish nanny looking after acting governor Palin's daughter dies suddenly - and in mysterious circumstances - mission school-educated local girl Su Lin - an aspiring journalist trying to escape an arranged marriage - is invited to take her place. But then another murder at the residence occurs and it seems very likely that a killer is stalking the corridors of Government House.

Singapore, 1910 - Desperate for a fresh start, Harriet Gordon finds herself living with her brother, a reverend and headmaster of a school for boys, in Singapore at the height of colonial rule. Hoping to gain some financial independence, she advertises her services as a personal secretary. It is unfortunate that she should discover her first client, Sir Oswald Newbold - explorer, mine magnate, and president of the exclusive Explorers and Geographers Club - dead with a knife in his throat.

Bombay, 1921: Perveen Mistry, the daughter of a respected Zoroastrian family, has just joined her father's law firm, becoming one of the first female lawyers in India. Armed with a law degree from Oxford, Perveen also has a tragic personal history that makes her especially devoted to championing and protecting women's legal rights. Mistry Law has been appointed to execute the will of Mr. Omar Farid, a wealthy Muslim mill owner who has left three widows behind. But as Perveen is going through the paperwork, she notices something strange.

Nestled high in the Tuscan hills lies Villa Volpone, home to renowned crime writer Jonah Moore and his creative writing course. It’s also the last place retired DCI Dan Armstrong expected to spend his retirement! Dan’s no writer, but maybe this break will help him to think about the next chapter in his own life story? But only days into the course, Jonah Moore is found stabbed to death with his award-winning silver dagger! And Dan finds himself pulled out of retirement with a killer to catch.