An Indian girl Asha (Yami Gautam) falls for a Pakistani musician Aman (Ali Zafar). Getting deeply involved in each other the couple decides to tie the knot but, here stands the biggest hurldle, to convince Asha's family; her over loud mom (Kiran Kher), clumsy brother Manav (Anuj Pandit), seductress sister Jia (Sarah Khan) & not so sound father (Anupam Kher). A man on mission, Aman finally reaches Asha's place to meet her family. All turns out quite well until Aman's nationality come to their notice & the whole "siyapaa" takes place. Finding a way out of this, the wool gets tangled and the situation becomes worse as the night falls dark.