The film revolves around three flirts Akshay Kumar, Ritesh Deshmukh and Fardeen Khan or normally the womanizers, all of whom have only one mantra in their lives: Flirt-Sleep-Ditch. All the three bachelors do this job quite easily without ever trying to commit fulltime to any female. But a small girl less than a year old makes an entry into their lives thereby completely changing their lives forever. Though the bachelors struggle to hold onto baby with their flirting disease, one tragedy happens which eventually make them become more responsible as a dotting fathers to the young kid. And with the entry of Vidya Balan in the later half, the story takes a completely new turn.