William Huxley finds himself at the center of a cutting-edge research expedition to Wuhan to find the origins of the quickly spreading COVID-19, now finding its way into the free world.
Venturing into the remote caves, William finds himself confronting death and inexplicable events that see all his teammates soon perish under the rapid progression of a mutated form of the virus.
His older sister, Elizabeth, suddenly goes missing after working with a team of researchers on a cure, and William.