MANMARZIYAAN is the story of a girl trapped between two lovers. Rumi (Taapsee Pannu) is a rebellious girl from Amritsar. She is orphaned at a young age and stays with her paternal uncle and family. She's in love with Vicky aka DJ Sandzzz (Vicky Kaushal) who stays close to her house. Vicky is used to secretly coming to her house to meet her in her bedroom. One day, he gets caught and all hell breaks loose. Rumi's family members decide to get her married. But Rumi puts her foot down, stating that she'll marry only Vicky. She also assures that Vicky and his parents will come to their house to ask her hand for marriage. However, Vicky shies away from responsibilities. Hence, he gets a jolt when Rumi brings up the topic of marriage.
Meanwhile, Robbie (Abhishek Bachchan), based in London, arrives at Amritsar to meet his family and get married, as per the wishes of his family. Realizing that Vicky is commitment and marriage phobic, Rumi gives the nod to her family to find someone for marriage. Hence, Robbie and Rumi meet. For Robbie, it's love at first sight. Rumi also agrees for marriage. Vicky gets livid when he hears about her wedding. A day before the marriage, he tells Rumi that he's changed and is ready to take responsibilities and get married. Rumi still has love for Vicky and she agrees to elope with him. She first meets Robbbie at night and informs him that she can't get married to him. What happens next forms the rest of the film.