A gripping true-crime documentary follows the investigation into the deaths of six members of the same family, each killed by poisoning within an eleven-month span. Unbelievably, the prime suspect is the very woman who administered the poison, Jolly Joseph, the mother of two of the victims and wife of the deceased patriarch. The film explores whether this seemingly innocent and unassuming woman was truly capable of such heinous crimes and this systematic wiping out of her own family.