In 2008, Deepak Kumar (Saif Ali Khan) an MSc topper, is at an interview for the teacher's post at an affluent school. The interviewers turn him down when they discover his low-caste roots. Deepak relates the incident to his mentor, Dr. Prabhakar Anand (Amitabh Bachchan). Dr Anand, the legendary principal of renowned STM college, where Deepak studied, offers Deepak an interim job as a teacher at STM. Deepak is comforted by his friend, Sushant (Prateik Babbar), an upper-caste boy, and his girlfriend Poorvi (Deepika Padukone), who is Dr. Anand's daughter.