The story is that Rajni, daughter of a chaudhary of Patti, told her father that whatever a person receives comes from God and not from him. He married her to a leper in anger.
She carried him in a basket and begged. At a pool in the forest she left him on the bank and went for food. He watched black birds go into the water and come out white, dragged himself in, and was cured.
The pool is the sarovar at Amritsar. The story is attached to the founding of the tank, in the time of Guru Ram Das Ji, and Dukh Bhanjani Beri, the jujube tree on the eastern side of the parikrama, marks it.
Pilgrims bathe at that spot in particular for healing, which is the most explicitly miraculous practice at the Golden Temple and sits uneasily with Sikh doctrine on ritual.
The story is told constantly and its point is the argument at the start, not the cure at the end.
The account is that she was disinherited for saying that what a person receives comes from God, married to a leper by her father, and that her husband was cured at the pool at Amritsar.
The story is one of the foundation accounts of the sarovar and of its association with healing, which is still part of why people bathe there.
Her father is given as the chaudhari of Patti in Tarn Taran district, which is the historical anchor the account has and the only one.