From the African State of Zaire to America brought the smuggling a small monkey. But no one knew what monkey is infected and together with the animal on American soil gets fatally dangerous virus. Playful creature clawing at his master and he becomes distributor of infection. The epidemic is evolving very quickly, taking the lives of people. In the fight against the virus will take as doctors-epidemiologists and virologists-military led by Colonel Sam Daniels.
As the investigation into the events that led to the epidemic, Sam Daniels learns that the virus was removed many years ago and classified by a higher authority. From it there is an antidote in the form of a specially designed whey, but to make its necessary blood original media is restless African monkey. However, finding little creature is not so easy, nobody knows where it is. Time inexorably goes and the virus continues to takes many lives.