The mind should be resolute) is a 1987 Indian Tamil-language drama film written and directed by K. Balachander.

In the hospital, she saves a woman attempting suicide and brings her home and later finds out that she is fond of movies.

One day, Nandini's siblings, Ramesh and Vivek, go to Chennai to give a visit to her.

In a twist of events, Nandhini's divorce comes to light and her father dies of heart attack.

It is also revealed that Sundari was serving as a mistress to a rich man as she is the sole breadwinner of her family.

She then finds a similar job for a high-profile celebrity at Delhi, and Nandhini continues to morally support her.

It is found that Nandhini's boss Dr. Arthanari has committed himself 24/7 for doctor service and lied about being married for the past seventeen years.

Arthanari informs her that Surya was more worried about their sexual life after her kidney donation and does not appreciate her act of kindness like she earlier thought.

[2] Manathil Urudhi Vendum is K. Balachander's third film where "the daughter has to make sacrifices and take care of her family", following Arangetram (1973) and Aval Oru Thodar Kathai (1974).

Bhagyaraj's proposed film was later shelved, and Aravind returned to Manathil Uruthi Vendum.

[14] Manathil Urudhi Vendum was released on 21 October 1987,[15] and Sister Nandini on 31 March 1988.

[12] The Indian Express wrote, "Manadhil Urudhi Vendum comes over like a badly written stage play.