Agents from the FBI and Florida Department of Law Enforcement investigate a series of murders linked to conspiracy theorists and doomsday cults.

When a renowned expert in infectious diseases disappears without a trace, Letty Davenport, with the world on high alert, calls in her father, Lucas, to locate him, and when their worst fears are confirmed, they must race against time to stop the virus he created from becoming the perfect weapon.

"While investigating a toxic outbreak in the Caribbean Sea that may ultimately threaten the United States, Pitt unwittingly becomes involved in something even more dangerous--a post-Castro power struggle for the control of Cuba. Meanwhile, Pitt's children, marine engineer Dirk and oceanographer Summer, are on an investigation of their own, chasing an Aztec stone that may reveal the whereabouts of a vast historical Aztec treasure. The problem is, that...

"TJ Devlin is the charming disappointment in the prominent Devlin family, all of whom are lawyers at their highly successful firm-except him. After a stint in prison and rehab for alcoholism, TJ can't get hired anywhere except at the firm, in a make-work job with the title of investigator. But one night, TJ's world turns upside down after his older brother John confesses that he just murdered one of the clients, an accountant he'd confronted with...