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. Rhea is sensitive, well bred and self confident. She can give as good as she gets and is not afraid of standing up to men. Initially, the two have very little in common. But, as life would have it, their paths keep crossing and, over the course of a decade, their relationship evolves, from hate to mutual respect, friendship and finally…LOVE.