Lala Kedarnath Prasanta (Balraj Sahni) has 3 sons whose birthdays are on the same day. On one of the annual birthday bashes, a well-known astrologer advises him not to be proud for his achievements as 'Luck' (kismat) plays key role in everybody's life and thus, do not be optimistic for own future achievements. Lala Kedarnath ignores the prediction and is busy making plans for an even wealthier future. He proclaims to his wife (Achala Sachdev) that he wants them to be even richer. As he talks of the day when people shout after his car, There goes Lala Kedarnath!!!!, there is a sudden earthquake and the whole town crumbles into ruins. When Lala Kedarnath regains consciousness, his house has been destroyed and his family is gone. The oldest son, Raju, ends up in an orphanage, while middle son, Ravi, (Sunil Dutt) is found on the road by a rich couple who takes him to their home to raise him as his own. Their youngest son, Vijay, (Shashi Kapoor) who is still an infant, is...