After a former NUMA colleague disappears while researching the icebergs of Antarctica, Kurt Austin and his assistant Joe Zavala investigate. Even as they confront perilous waters and frigid temperatures, they are also are up against a terrifying man-made weapon: a fast-growing ice that could usher in a new Ice Age. Pitted against a determined madman and a monstrous storm, Kurt and the NUMA team must unravel a Nazi-era plot in order to save the globe from a freeze that would bury it once and for all. -- Adapted from jacket.