A historical drama set in Roman Egypt, concerning philosopher Hypatia of Alexandria and her relationship with her slave Davus, who is torn between his love for her and the possibility of gaining his freedom by joining the rising tide of Christianity.

The Investigator, a benevolent alien from a distant galaxy, selects an Earth boy and girl, John and Julie, to assist him in his mission to make their world a better place. The pair are miniaturized to assist The Investigator more easily, and assigned to prevent the theft by Stavros Karanti of a 14th-century masterpiece from a church on the island of Malta. John and Julie are presented with a car and a boat, scaled to accommodate their miniaturized size and set out to thwart Karanti's plans...

One of the US Air Force's most modern tactical aircrafts, an F-100 with a new laser guidance system, crashes into the sea near Malta - a region where the Soviet forces are highly present, too. The CIA immediately sends out their best secret agent, Ken Tani, to salvage the system before it falls into enemy hands. To ensure his loyalty, they bring his two young sons to a nearby hotel on the island.