Area X has claimed the lives of members of eleven expeditions. The twelfth expedition consisting of four women hopes to map the terrain and collect specimens; to record all their observations, scientific and otherwise, of their surroundings and of one another; and, above all, to avoid being contaminated by Area X itself.

Biologist and former soldier Lena is shocked when her missing husband comes home near death from a top-secret mission into The Shimmer, a mysterious quarantine zone from which no one has ever returned. Now, Lena and her elite team must enter a beautiful, deadly world of mutated landscapes and creatures, to discover how to stop the growing phenomenon that threatens all life on Earth.