This film came after the heavy debacle of Mera Naam Joker, which was the dream project of Raj Kapoor.

[4] The title is an allegory to the ideological clash between three generations: Kal (Grandparent – representing the past.

Ram's son Rajesh (Randhir Kapoor), who had been sent to London for higher studies, returns to India.

However, Rajesh is in love with his girlfriend Monica "Mona" (Babita), and objects to the marriage alliance by his grandfather.

Unable to decide whether he wants his father or son, Ram leaves his home, causing the grandfather and grandson blaming each other.

The overjoyed Ram throws a party in celebration, however, he overhears his father and son talk about the ploy.

Diwan asks him why he looks so sad and tells the bride to lift up the veil, revealing that the girl he married wasn't Laxmi but Mona instead.