The mastermind: drugs, empire, murder, betrayal

This is the incredible true story of a decade-long quest to bring down Paul Le Roux - the creator of a frighteningly powerful Internet-enabled cartel, who merged the ruthlessness of a drug lord with the technological savvy of a Silicon Valley entrepreneur.

It all started as an online prescription drug network, supplying hundreds of millions of dollars' worth of painkillers to American customers.

It would not stop there. Before long, the business had morphed into a sprawling, multinational conglomerate engaged in almost every conceivable aspect of criminal mayhem.

Investigative journalist Evan Ratliff spent four years piecing together this intricate puzzle, chasing LeRoux's empire and his shadowy henchmen around the world, conducting hundreds of interviews and uncovering thousands of documents.