Complex sentence: Television journalist Diana (Gabrielle Fitzpatrick) records footage of a cocaine deal gone wrong between the Italian mob and a street gang called the Demons with mob boss with Giancarlo (Richard Norton) killing the Demons' leader.
Split into simpler sentences: Television journalist Diana (Gabrielle Fitzpatrick) manages to record footage of a cocaine deal gone wrong, between the Italian mob and a street gang known as the Demons. The footage shows mob boss Giancarlo (Richard Norton) killing the Demons' leader.