UNCLE headquarters in Rome is raided by Thrush agents who swipe a small, jewel-like device called a Montori. The Montori allows UNCLE agents to listen in on any UNCLE channels, even scrambled ones. Waverly orders all communications at UNCLE to cease until the device is recovered. With six world leaders coming together for a top-secret conference, Waverly believes Thrush intends to create chaos at the meeting. Without communications, Waverly is unable to warn the world leaders of the probable danger. April and Mark must find the device.

Mexican millionaire and bullfight aficionado, DeSada, is head of Thrush:Central America. In an effort to gain control of Project Gamma, a rocket transport capable of 5,000 mph, he has kidnapped the three men who have created it. Meanwhile, his own scientist has develped a machine capable draining a brain of all its knowledge and transfering to a computer tape. April has made contact through one of DeSada's helpers, a famous matador. Mark takes on the persona of a bullfight critic to aid April in freeing the three kidnap victims.

April is tied atop a car being attacked by an eagle as part of an experiment by a retired Thrush agent, Gita Vlander. From inside Gita, Thrush agent Egon, and Gita's scientist watch. The scientist has a molecular reorganizer and aims it at the eagle. The eagle vanishes and turns up in a cage behind Egon. Gita assures him it works on people, too.

April is lured off and drugged in an African airport where she his waiting for Mark. When she recovers, Mark is gone. April is sent to Topango to stop a plot that includes killing the King and stealing the country's diamonds.

The Utter Anguish Gold Mine is up for grabs when the owner dies. The mine contains a huge vein of Triterian crystals that can be used to make death beams from laser light. Thrush and UNCLE are VERY interested in acquiring the mine.

Thrush has developed a new mobile force that enable them to disrupt UNCLE operations. Mark infiltrates the group and tapes their transmissions. He makes his getaway, hides the tape in his rented car, and contacts April but he is shot in the leg. The car and tape are stolen by a man who overhears his transmission to April. Mark is taken off the case; April is assigned the case.