Hannah Bayford and her family just moved into their new home in Concord, New Hampshire. A big, beautiful old home... the kind of home many families dream of. But this dream is turning out to be a nightmare.
While hiking in the forest in Paducah, Kentucky, Jason Bradford and his sister, Jillian, spot a lizard in a tree. However, this is a species of lizard they've never seen before. It's nearly two feet long--and vicious.
When two children discover thousands of iron insects about to descend upon Elkhart, Indiana, they race against the clock to uncover the secret of the bizarre bugs and try stop them before they terrorize the entire city.
Jacob and Shannon Brenner are recruited as scuba divers to lead a dangerous recovery operation-- an undersea submarine is leaking a dangerous substance.