An employee at the monkey research facility falls ill, causing Dr. Nancy Jaax to fear the virus has spread to the human population; Jerry Jaax searches for a way to protect his wife; Dr. Wade Carter is obsessed with exposing the dangers of Ebola.

Dr. Nancy Jaax works tirelessly to find out why the virus is behaving differently than expected in human victims; unforeseen dangers arise at the research facility; Jaax is forced to make a choice between her family and her duty to her country.

A volatile situation inside the research facility comes to a head; Dr. Jaax steps up, but exhaustion threatens the precision needed to sterilize the threat; the press arrives, and neighbors become aware of the danger next door.