When John Connor, leader of the human resistance, sends Sgt. Kyle Reese back to 1984 to protect Sarah Connor and safeguard the future, an unexpected turn of events creates a fractured timeline.

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.