A motocross team on their way to trial a new super-fuel head out across the desert lead by Rachel, who, unbeknownst to the rest of the group, is a survivor of the cannibal clan which menaced the Carter family several years before.
Scientist Dr. Bradford Crane and army general Thalius Slater join forces to fight an almost invisible enemy threatening America; killer bees that have deadly venom and attack without reason. Disaster movie-master Irwin Allen's film contains spectacular special effects, including a train crash caused by the eponymous swarm.