A mysterious and evil virus attacks a military base deep in the jungle, causing the infected humans to lose their minds, become manic and bloodthirsty, and massacres and bloodshed spread throughout the jungle. First responders Sonia (Hélène de Fougerolles) and her boyfriend Mark (Francis Renaud) rescued a wounded person, but the strange symptoms on the wounded person made them panic. The female soldier who left with the car insisted on abandoning the wounded, so she had an argument with Sonia and Mark. In the chaos, she shot the seriously injured indiscriminately, and she died in the gunfight. The blood of the wounded splashed on Mark, causing him to be infected with the virus. Sonia drove alone through the snowy mountains and took her lover to find a place for treatment and refuge. While waiting for rescue, Mark's body gradually changed. Faced with her lover who was gradually losing his humanity, Sonia had to make a choice...