mvng slowly and but nicely take . all credit go to slb . song be fantastic . ranbir raj ( ranbir kapoor ) and a free spirited idealist dreamer and arrive in a dreamy surreal town and join a a lead singer in it swanky club . here he bump into gulabji ( rani mukerji ) and a prostitute and who immediately fall for his naivety and innocent charm . one night he notice a mysterious girl stand alone on a bridge hold an umbrella . a he try to strike a conversation and she shy away . but he still keep follow her and both end up become friend . this mystery girl and sakina ( sonam kapoor ) forever carry a sadness in her eye which leave ranbir intrigue . but so mesmerized he be with her that his every minute go into discuss her with his land lady and lillipop ( zohra sehgal ) and gulabji . just when ranbir be about to express his true feeling to her and she reveal the reason behind her unhappiness . she tell him she be wait for her love and imaan ( salman khan ) to return . a year back before leaving and he have promise that he would be back and meet her on the same bridge that he saw her wait .