In the capital of Venezuela, two Russian migrant construction workers use drugs, after which one of them goes crazy and attacks the other. He escapes, not realizing that he is carrying an unknown virus and will start a terrible epidemic. At this time, somewhere in the countryside, a widower doctor sends his son to his grandparents, and the next day he notices that the neighbors he has long known begin to behave strangely. When it becomes apparent that a terrifying infection is spreading across the country, the man decides to get to his son at any cost.