Scientist Siddharth(Sharman Joshi) is given "Ma Kasam" by elder brother Harsh(Sanjay Suri) to carry her alongside for his marriage ceremony with Aaliyah(Chitrangada Singh) to be held in Mauritius. Their mother(Shabana Azmi) is least fascinated with attending the marriage as a result of Harsh is getting married in opposition to her needs. Dad(Boman Irani) and Siddharth reach bringing mother to Mauritius the place Aaliyah is Siddharth
