A piece of America in the heart of the Caribbean, Puerto Rico is a tropical paradise. But it is also America’s most vulnerable border.

Closer to Colombia than Florida, this exposed piece of American territory is the setting for non-stop action for a diverse group of agents and investigators who man Puerto Rico’s front lines. They never know what the day will bring: brazen smugglers in highly-tuned speedboats, multi-million dollar narcotics seizures, illicit currency, weapons, stranded migrants, and much more. Life is never quiet in the action capital of the Caribbean.