Cousins and avowed bachelors, Nath and Gautam, plan a trip to Bombay with the sole motto of entertainment, fun, and frolic. After drinking the cup of pleasure to its full they should return to their native place as neat and clean as they had come i.e. without losing their precious "DIL" to any city sweetie.
But the bachelors cannot escape the trap of nature and Nath and Gautam lose hearts to bewitching Vijay and Seema respectively and carry on romantic interludes hiding from one another.
When Cupid reaches its climax the boys persuade their common friends Shambhu and Sharda a happily married couple, to negotiate their marriage with the guardians of their love larks. But Vijay's Mama refuses Sharda's offer demanding Rupees Fifty Thousand from the prospective groom Nath, while Seema's hand is refused to Gautam by her boxer father who intends her marriage with an athlete only. Disappointed at the outset the couple later seek civil marriage and one fine day Nath and Gautam face each other in their true colors, the brides occupying the places of their secrets.
For a while, it seemed that the cousins had embarked on a happy married life, but the conspiracy of the villainous Mama wrecked their homes. A situation is created where the better halves Vijay and Seema abandon Nath and Gautam, taking the two fake imposters to be their real wives.
And then begins the drama of hilarious comedy and tense suspense with the Mama and Hanuman Pershad, the notorious secretary of the chawl in which Nath and Gautam had their apartments, at the helm of affairs.
And as though to add fuel to the fire Choudhary, Nath's father, and Gautam's uncle appears on the scene furiously demanding the accounts from the wastrels.
And rest is for the audience to see, laugh and enjoy, and after the happy reunion of the estranged couples certify "HOLIDAY IN BOMBAY" as an enlightened screen fare worth seeing a number of times.
[from the official press booklet]