For the past 160 years, giant birds have been reported in the skies above the Black Forest region of northern Pennsylvania. Now, it's up to one man and one woman, to find out where they came from, and where they've gone.

Failed Ph.D. candidate and assistant museum curator Ian McQuade is rescued by cartographer Alma Del Nephites, after an ill-fated expedition into the Amazon Basin.

They travel to meet the enigmatic CEO of a secretive organization, where the two are given the opportunity to seek out proof of the existence of thunderbirds.

A madman's journal will lead them into the heart of a 700 year-old mystery, where cutting edge technology designed to locate and identify such creatures will collide with an ancient power that has hidden and protected them for centuries.

Ian must face his past, in order to believe in a future that couldn't possibly exist. With lightning in their eyes and thunder in their wings, who will control the fate and destiny of the thunderbirds?