When a cryptic warning suggests a dangerous global syndicate is funding worldwide chaos using pirate treasure hidden for centuries, British intelligence commander Rupert Wallace races to investigate in Jamaica. He recruits the genius Adhikary family of historians and investigators to uncover the truth about rumors of a vast underwater bounty bankrolling the elusive "Nexus" crime network.

Posing as antiquities buyers, the Adhikarys infiltrate Nexus operations on the island but soon find themselves fighting for survival and racing to expose Nexus. Clues lead them to a long-lost pirate horde submerged deep below the surface containing unimaginable riches. But sinister forces will stop at nothing to protect the stolen fortune and their far-reaching criminal empire.

In a globe-spanning adventure, the investigators and their MI6 allies utilize history, cutting-edge technology and raw courage to dismantle Nexus step-by-step. But defeating such a sprawling adversary will test the limits of loyalty and sacrifice. Their white-knuckle quest ultimately builds toward an explosive showdown with the shadowy crime lords where more than one life hangs in the balance...