1967年美军在非洲驻扎了一个军营，军营了突然爆发一种恐怖的疾病，军方抽取病人血样后发现是一种不知名的恶性传染病。很快一架直升机飞来投下炸弹将此处夷为平地。爆炸中所有人都未能幸免，但有两只猴子逃了出去。转眼到了90年代，美军上校军医接到命令到非洲考察一种陌生病毒。山姆一行发现恐怖场景，感染病毒的人病状十分可怖，两三天之内就会不治身亡，幸运的是病毒不会通过空气传播。山姆一行无能为力，只能暂时采集样本后离开。回到美国研究所后，山姆被通知停止调查。山姆不知道的是，他们此次带回来的病毒样本经过检测，与1967年美军在非洲带回来的病毒样本是一样的，而且军方已经用病毒制造出生化武器。此时一个美国青年从非洲抓了一只白脸猴带回美国售卖，因为买家不满意，青年随意将猴子释放进一片树林。不久青年病发，而且与青年有接触的人也陆续病发。很快，医院诊断出青年患的恶性传染病，医院追问青年病源时，青年来不及说出从非洲带回猴子的事就一命呜呼。此时一个小女孩正为携带病原体的猴子投食…

In 1967, the U.S. military was stationed in a military camp in Africa. A terrible disease suddenly broke out in the military camp. After the military took blood samples from the patient, it was found to be an unknown vicious infectious disease. Soon a helicopter flew in and dropped bombs that leveled the area. No one survived the explosion, but two monkeys escaped. In the 1990s, the colonel of the US military received an order to investigate a strange virus in Africa. Sam and his party discovered a horrible scene. People infected with the virus had terrible symptoms and would die within two or three days. Fortunately, the virus does not spread through the air. Sam and his party could do nothing but collect samples temporarily and leave. After returning to the American Institute, Sam was notified to stop the investigation. What Sam didn't know was that the virus samples they brought back this time were tested to be the same as the virus samples brought back by the US military in Africa in 1967, and the military had already used the virus to make biochemical weapons. At this time, an American youth caught a white-faced monkey from Africa and brought it back to the United States for sale. Because the buyer was dissatisfied, the youth released the monkey into a forest at will. Soon the young man fell ill, and those who had contact with the young man also fell ill one after another. Soon, the hospital diagnosed the young man with a vicious infectious disease. When the hospital asked the young man about the source of the disease, the young man died before he could tell about the monkeys he brought back from Africa. At this time, a little girl was feeding the monkeys carrying the pathogen..