Description: Balaji and Mithun Luthria`s Once Upon A Time In Mumbai is seen through the eyes of a police officer. It traces the changing face of Mumbai`s underworld and how it all started. The film, set primarily in 1970`s Mumbai, follows the rise of Sultan (Ajay Devgn), and the conflict when his protege Shoaib (Emaraan Hashmi), challenges supremacy and unsurps power to rule the murky underbelly of Mumbai.