This is the story of Romeo (Saif Ali Khan) a Casanova dog who once lived in luxurious surroundings but is dumped on the streets after his owner migrates to London. Romeo is now faced with situations he has never been in before. He is cornered by 4 strays that scare the hell out of him. But soon, he smooth talks his way into their hearts and he makes friends. Then, Romeo finds love for the beautiful, ravishing Laila (Kareena Kapoor), the most beautiful girl he has ever seen - and he loses his heart to her at first sight. Finally, he encounters the dreaded Don of the area - Charlie Anna (Javed Jaffrey). The Don who everyone is scared of. It is journey of Romeo to roadside Romeo, wins friendship, love and a new life - inspite of Charlie Anna and his gang.