Barsaat Ki Ek Raat (Hindi: बरसात की एक रात; English: One rainy night) is a 1981 Bollywood film starring Amitabh Bachchan, Raakhee, Amjad Khan and Utpal Dutt. It was directed by Shakti Samanta. Barsaat Ki Ek Raat was filmed in two languages; the Bengali version, titled "Anusandhan", was the top grossing Bengali movie ever for a number of years. The story was adopted from the novel "Anushandhan" by Shaktipada Raajguru.
In a small village in Darjeeling, Sahuji (Utpal Dutt) the merchant has weaved a web of corruption in every layers of the social fabric. He supplies materials of inferior quality to the tea garden, and then bribes the accountants to pass his bills. When one of the managers, called "Boro Babu", (Abhi Bhattacharya), stands up, Sahuji pays the workers to go into strike against this Boro Babu. And he is also involved in rampant smuggling of goods across the border, and everyone from the local jeweler to the local police inspector are part of his intricate web.