A killer uses potassium to cause heart attacks in victims

When vengeful General Francis X. Hummel seizes control of Alcatraz Island and threatens to launch missiles loaded with deadly chemical weapons into San Francisco, only a young FBI chemical weapons expert and notorious Federal prisoner have the skills to penetrate the impregnable island fortress and take him down.

A stunt pilot comes across a prototype jetpack that gives him the ability to fly. However, evil forces of the world also want this jetpack at any cost.