How does the modern Federal Bureau of Investigation operate, especially in the age of sophisticated law-enforcement technologies? This series, ahem, launches an investigation into the 21st-century FBI, where the challenges range from pursuing arsonists, cyber criminals and arms dealers to tracking down terrorists. As tactics for hunting the world's most dangerous criminals evolve, so too do the agents who work these high-profile cases, and the series depicts the intensity and captures the human drama experienced by the FBI's heroes.