Satya Chaudhry, a woman dying of cancer, requests her childhood friend, Roop, to provide companionship to her husband, Dev. Roop agrees on the condition that she marries Dev. Once married, Dev tells Roop that their relationship will be cordial and platonic. A depressed Roop takes solace in music, which she begins learning from the madam of a brothel, Bahaar Begum. She also begins working in her husband's publishing house. Roop expresses interest in writing about the condition of the locality in which the brothel is located, during which she interacts with a womanising blacksmith named Zafar.

Zafar wants to exact revenge on his parents, Bahaar Begum and Balraj Chaudhry by seducing Roop, who is married to Balraj's legitimate son, Dev. Roop misconstrues Zafar's intentions and falls in love with him. She also begins to develop a friendship with Dev, to Satya's pleasure.

Kalank’ is Dharma Productions multi-starrer movie starring Alia Bhatt, Varun Dhawan, Sonakshi Sinha, Madhuri Dixit, Sanjay Dutt and Aditya Roy Kapur in the lead role.