James Bond.

Nani is a trepid and fearful guy who works as a software engineer. Bullet is a mafia don in Dubai. Her mother doesn't know about Bullet's profession. Bullet is forced to come back to India when her mother falls ill. Her mother's last wish is to get Bullet married. That's when Nani falls in love at first sight with Bullet when she visits a temple wearing a traditional dress. Rest of the story is all about what happens when a coward like Nani marries a gangster girl without knowing her real profession.