UC Berkeley Professor of Microbiology, Dr. Mira Wallace, searches for ancient life in the most extreme environments on Earth. While sampling an ancient subterranean lake, the US Army summons Mira to investigate a mysterious biological threat in a Southern Utah desert.

SONA (Sudden Onset Necrosis Agent) is a new pathogen unlike anything known to science. Resilient and aggressive, it threatens Earth's entire biosphere, making Mira fear that she may have just found deadly evidence of the ancient life she's been searching for.