It has been eighteen years since his marriage. Next time, in 2034, he wakes up, he is a professor at Cambridge University, his dream job. He realizes he has been time travelling and has no control over it. He discovers that it has been two years since his marriage. Next up, in 2018, he wakes up in Cambridge, only to find his wife about to deliver their child. He discovers that it's been ten days since he married Diya. Jai gets drunk and passes out only to wake up in Thailand on his honeymoon. He tells Diya that he has other plans for his bright future and she may not be a part of it. Jai criticizes these meaningless rituals and talks negatively about his marriage. Jai reluctantly agrees to marry her but changes his mind because of the thought of the seven vows and the billion rituals, as well as the fear of divorce. While Jai hopes to get a fellowship at Cambridge University, Diya wishes to marry her long-term boyfriend. Jai is a mathematics professor and Diya, an artist. Jai Verma ( Sidharth Malhotra) and Diya Kapoor ( Katrina Kaif) are childhood sweethearts.