Love isnt always at first sight. Very often, a relationship develops slowly and it takes many years between boy meets girl and boy gets girl. Hum Tum is a refreshing look at the eternal battle of the sexes as it follows the lives of Karan (Saif Ali Khan) and Rhea (Rani Mukerji). Karan is a cartoonist and his character Hum and Tum reflect his perspective on the strange love-hate relationship between men and women.