Romeo is a dog who once lived in luxurious surroundings. One day his owners decide to migrate to London and he is left at the mercy of the servant of the house, who dumps him on the streets of Mumbai. Left to fend for himself, he is soon cornered by the local gang – Guru, Interval, Hero English and a dog-wannabe-cat, Mini, who tell him that this is their domain. Romeo does not know the street lingo and is at a loss for words at first, but he manages to win the gang over with giving them haircuts. They love their new looks and accept Romeo as part of their gang. Together, they set up a successful dog-grooming business until Chhainu, the right-hand of gangster-dog Charlie Anna, arrives to collect “hafta” (weekly protection money) in the form of bones. Romeo throws Chhainu out, and the others, terrified, go to Charlie to plead their case. Charlie threatens them with his trio of female ninja dogs, whom he calls his Angels, but Romeo tricks Charlie into allowing his friends to leave unhurt.
Romeo then meets Laila, who is singing from a rooftop, they dance and he falls in love. To win her over, Laila tells Romeo he must dance with her in front of everyone at the “Moonlight Club” where she performs. Romeo says yes, unaware that Charlie has long wanted her, and anyone who dares go near her is punished. However, Romeo braves the odds and dances with Laila to win her heart. As love blossoms between the two, Charlie, in a fit of rage, captures and terrorizes Romeo. Romeo then promises that he would make Laila fall in love with Charlie. Romeo does not intend to lose Laila, but plans to deflate Charlie’s ego by having a disguised Mini pretend to be Laila and make it clear she’s not interested. This only ends up exacerbating Charlie’s ire, forcing Romeo to promise him a second meeting with Laila.