The book is the biography of Sister Nivedita (born Margaret Elizabeth Noble), written by Pravrajika Atmaprana. It highlights her transformation from an Irish educator into a dedicated karmayogin in India. Her tireless work during the Calcutta plague epidemic is cited as proof of her profound sacrifice and devotion to her adopted home.  Swami Vivekananda, recognizing her deep understanding of the Indian soul, famously set her on her life’s mission with the simple instruction: "Love India."

Ultimately, the book portrays her life as a "remarkable manifestation of ancient love" and a bridge between Western origins and Indian thought.