Thriller starring Sidney Poitier as Roy Parmenter, an FBI agent in San Diego. 20 years ago his partner was killed by a Soviet spy, nicknamed Scuba (Richard Lynch). Still at large, Scuba is now trying to extort the Soviets and to prove he's serious, he's killing their agents one by one, including 'sleepers', agents under deep cover awaiting orders. Roy interviews a high school lad, Jeff Grant (River Phoenix), an applicant to the Air Force Academy. In a routine background check, Roy discovers that Jeff's parents are sleepers. He must see if Jeff is also a spy, confront the parents yet protect them, and catch his nemesis. Meanwhile, the Soviets have sent their own spy-catcher, the loner Karpov (Richard Bradford), to reel in Scuba.