An account of the lives of these great saints - of Guru Nanak and Gautama Buddha; Baha'u'llah and Lord Dattatreya; Tulsidas and Purandardas; Rabiya and Avvaiyar; Tolstoy and Gurudev Ranade; Sri Ramakrishna and his sacred consort, Ma Sharada; and, modern day sages like Kagawa and the one and only Helen Keller.