In the 1970s, the Boston underworld is in chaos. Dozens of Irish neighborhood gangs have spent decades brawling over turf, creating a power vacuum.

In the 1990s, three violent cartels battle for control of the Mexican drug world. But one brutally ambitious Narco will rise above the rest to create one unified cartel, and become the most powerful criminal in Mexico's history.

In the 1970s, the Colombian cocaine trade is wide open. Hundreds of small-time smugglers compete for control of the lucrative new racket.

In 1980s New York, the American Mafia is at war with itself. Two opposing factions, old school versus new school, split the Gambino crime family down the middle.