Humko Deewana Kay Gaye - Aditya, played by Akshay Kumar, an automobile engineer in a car company, is engaged to Sonia, played by Bipasha Basu, a fashion designer who is about to make her mark in the field. Though the marriage date is fixed, Aditya had to leave for Canada to learn about the technique of a new car model, to be launched in India; while Sonia had to leave for Paris for a fashion show. Aditya arrives in Canada where his sister Simran, played by Bhagyashree, is living. Jia, daughter of business tycoon Yashwardhan Birla, has come to Canada all alone to shop for her wedding with the business giant, Karan Raichand. Jia was a simple girl with simple needs. She had everything she could ask for in her childhood, but never time from her ever so busy father. And now the man her father had chosen for her hardly had any time to spend with her too - that is when she found a friend in Aditya. However, fate makes them meet for the last time; at Jia's wedding.