Burt Gummer and Travis Welker find themselves in a fight for survival after investigating deadly giant worm attacks in the Canadian arctic.

When a group of hunters genetically modify Graboid eggs, they face an all-out war against the larger, terrifyingly intelligent creatures, and swiftly multiplying Shriekers!

When Gummer is hired to capture a deadly creature terrorizing South Africa, he and his new sidekick, Travis Welker, engage in another battle of survival against the fiercely aggressive Graboids.