When four people turn up dead at the bottom of a Florida sinkhole, New York DEA Agent Fred Boff has no idea it will launch him into a tangled web of illicit operations spanning from Florida to Texas. The victims had stumbled onto a clandestine marijuana delivery, and with the help of Panama City jailbird Ronnie Ray, Boff connects the dots in a complex trail of smugglers, planes, boats, and drug dealers to wealthy businessman Rex Cauble, a man beloved by law enforcement and a pillar of the community. Boff and his colorful team of agents become determined to stop the flow of drug money and marijuana from one of the biggest drug operations in U.S. history and to bring down Cauble's sprawling drug ring run by kingpins known as the "Cowboy Mafia". But as evidence piles up, questions emerge. Is the folksy millionaire truly the criminal mastermind he seems? In the end, it's up to Boff and his team to determine if they're implicating an innocent, prominent businessman or skillfully unveiling the secret leader of the largest drug trafficking operation in 1970s America.