Complex sentence: Mumbai is in the midst of a turf war between many gangs, collectively referred to as the Mumbai underworld when Satya (J.D Chakravarthy), a man without a past, comes to the city looking for employment.
Split into simpler sentences: Mumbai is in the midst of a turf war between many gangs, collectively referred to as the Mumbai underworld. It is in these circumstances that Satya (J.D Chakravarthy), a man without a past, comes to the city looking for employment.