"Triple 9" akan berpusat tentang pencurian di Los Angles dimana sekelompok pencuri berencana untuk membunuh polisi (dalam kepolisian dikenal dengan kode 999). Hal ini bertujuan hanya untuk menjadi pengalihan dari lokasi pencurian mereka.
In TRIPLE 9, a crew of dirty cops is blackmailed by the Russian mob to execute a virtually impossible heist. The only way to pull it off is to manufacture a 999, police code for "officer down". Their plan is turned upside down when the unsuspecting rookie they set up to die foils the attack, triggering a breakneck, action-packed finale filled with double-crosses, greed and revenge.