Husband-and-wife team Sami and Remi Fargo are on a climate-control expedition in the Arctic when they discover a Viking ship in the ice filled with pre–Columbian artifacts from Mexico. As they plunge into their research, tantalizing clues about a link between the Vikings and the legendary Toltec feathered serpent god Quetzalcoatl --- and a fabled object known as the Eye of Heaven --- begin to emerge. But so do many dangerous people.