This intense drama about Indian freedom fighters jumps back and forth between the present and the past, and A. R. Rahman’s impressive soundtrack similarly flows seamlessly between a disparate array of moods and styles. He incorporates tradition on "Ik Onkar", a Sikh prayer sung with an affecting sincerity by Harshdeep Kaur, while the electronics and dance beats of "Masti Ki Paathshala" and "Khalbali" highlight Rahman’s modern side, and "Luka Chuppi," his tender, tear-jerking duet with Lata Mangeshkar, transcends any era.