A villainous killer named Victor Yates and a young boy who can control minds from a distance lead the attack.

Tucker and Carpenter realize that Yates was once a CIA agent turned mercenary for the United States government, who was then hired to kill the scientists that were working on the projects at The Quartermass Organization, genetically engineering children to become weapons for the next decade.

After meeting Donner, who may never see his friend again, they seek refuge at the home of one of the witnesses, the Ealings, who have met Tucker after she survived the crash.

After meeting the Ealings, Carpenter tries to sneak inside the Organization and save the children being held hostage.

Joe and the girl, who he names Nina after his late daughter, are on the run and the boy dies.