Unwilling to get into an alliance with a moneybag's daughter,a quirky Kishore walks out of his moneyed father's huge house.Stone-broke he buys a half ticket to Bombay,masquerading as a thumb-sucking child in half pants.
En route,jewel theif Pran,who's on the run,slips a diamond into Kishore's pocket.Stage-dancer Madhubala's encounter with the 'little' Kishore on train,completes the introductions.

Then it's a one long mirth-ride with the love-stricken Kishore chasing Madhubala,and in his turn being chased by Pran,bent on retrieving his diamond. A rib-tickling comedy for all ages.