'Someone is stalking the streets of Sonagachi.' It's the 1870s, and Calcutta is bustling with commerce and colonialism. A sea of changes has been ushered in by the relatively new British Raj, which has led to migrants from all over India filling up the city with their hopes and dreams. Amongst these struggling masses is a serial killer on the prowl. Corpses of sex-workers start turning up at ponds and in the by-lanes of Sonagachi, Calcutta's famed pleasure district, choked to death and stripped of all their ornaments. Fear has gripped the city and the nascent police department seems to be chasing shadows. This is the story of Trinoyoni Debi: a sensuous seductress with a silver tongue and a love for all things shiny. But behind those eager eyes lurks a savagery that has made Trinoyoni the stuff of legends. How could such a breath-taking beauty be so terrifying? How many more will she kill before she is satiated? And is there anyone who can stop her? Follow her life as she transforms from a child widow to a famed courtesan and merciless murderer, becoming India's first-ever serial killer.