Rogue soldiers seize the UN complex in New York and demand a hefty ransom for the release of their diplomatic hostages (including Hood's daughter, Harleigh). Now it's personal, and Hood has returned to Op-Center to save his daughter.
Op-Center seeks the help of their Russian counterpart in tracking the legendary assassin, The Harpooner. Meanwhile, Paul Hood is called in when it appears the President might be undergoing a mental breakdown.
Op-Center is under new management as Paul Hood is reassigned to a Pennsylvania Ave. appointment. At the same time, bombings in Charleston, Durban, and Taiwan, may signify the outing of a feud within the Chinese government.
Although familiarly called "Op-Center", the actual name of the largely autonomous agency is the "National Crisis Management Center". The charter of the NCMC, or Op-Center, is unlike any other in the history of the United States. They handle both domestic and international crises. Director Paul Hood reports to the president himself, and what had started as "an information clearinghouse with SWAT capabilities" now has the singular capacity to monitor, initiate, and manage operations worldwide. The organization had its own paramilitary response team, called the Striker team, named by an Op-Center member who was a soccer fan, composed of members of the U.S. military special operations community. The series also mentioned similar organizations from England, whose response team was called Bengal, and Russia, with a team called Hammer.
The third Op-Center novel, Games of State, briefly alludes to the concept of a "Net Force". This concept was later expanded into its own Net Force series, created by the same men as Op-Center but written by Steve Perry (and later cowritten with Larry Segriff). No direct connection has yet been drawn between the two series, however.