On a scientific expedition to Siam young Billy Batson is given the ability to change himself into the super-powered Captain Marvel by the wizard Shazam, who tells him his powers will last only as long as the Golden Scorpion idol is threatened. Finding the idol, the scientists realize it could be the most powerful weapon in the world and remove the lenses that energize it, distributing them among themselves so that no one would be able to use the idol by himself. Back in the US, Billy Batson, as Captain Marvel, wages a battle against an evil, hooded figure, the Scorpion, who hopes to accumulate all five lenses, thereby gaining control of the super-powerful weapon.

American based Federation World Airlines has just acquired a Concorde jet, which will make its inaugural commercial flight from Washington D.C. to Paris and then to Moscow as a goodwill gesture prior to the 1980 Olympic Games. Among those on board is Maggie Whelan, a television reporter, who is taking both legs of the trip. Just after boarding at Dulles International Airport, she receives documents conclusively and unequivocally stating that her boyfriend, Dr. Kevin Harrison, the Chairman of Harrison Industries, an aerospace contractor, is complicit of illegally selling arms to enemy regimes. Regardless, Maggie loves Kevin, who vows to do the right thing by making a public statement to his illegal activities. Maggie also intends on making an on-air report of the story once she arrives in Moscow. Kevin, however, has other thoughts. He plans on destroying the documents, the most convenient way being to bring down the Concorde with Maggie aboard, initially having the attack on the plane ...

Dr. Carruthers feels bitter at being betrayed by his employers, Heath and Morton, when they became rich as a result of a product he devised. He gains revenge by electrically enlarging bats and sending them out to kill his employers' family members by instilling in the bats a hatred for a particular perfume he has discovered, which he gets his victims to apply before going outdoors. Johnny Layton, a reporter, finally figures out Carruthers is the killer and, after putting the perfume on himself, douses it on Carruthers in the hopes it will get him to give himself away. One of the two is attacked as the giant bat makes one of its screaming, swooping power dives.

Although his murdered friend was by all accounts a scoundrel a true "bounder" Edward Wales is determined to trap his killer by staging a seance using a famous medium. Many of the 13 seance participants had a reason and a means to kill, and one of them uses the cover of darkness to kill again. When someone close to the medium is suspected she turns detective, in the hope of uncovering the true murderer.