An elite team of mercenaries is hired for a covert operation, deep inside a former Soviet state. Arriving at an underground laboratory, their mission is to secure specimens of genetically engineered human and alien hybrids. Battling with a ferocious armed militia as well as dark, menacing creatures, the odds of survival are stacked against them.

The broken farmer Dan rents his farm for the scientist John from the Bovine Genetics Technology that is researching genetic modifications of cattle to increase its fertilization. The veterinarian Orla is bitten by the calf while helping the cow to deliver, and she feels that something went wrong with the experiment. During the night, the cow has a narrow passage for the calf, and Dan asks the young couple Jamie and Mary that is parked in a trailer in front of his farm's entrance to help him in the delivery. When the offspring is born, it bites Dan; Orla arrives later and realizes that it is a genetic anomaly and she sacrifices the calf. During the autopsy of the animal, she discovers that the fetus is pregnant and she destroys the freak hybrids. However, one of them escapes and attacks a cow first and Jamie later. When John arrives in the farm, he discovers that there is the danger of infection of human beings and decides to quarantine the spot...

In the Federal Science Institute, Dr. Jillian O'Hara and her assistant Brian Murphy will demonstrate their research to a commission led by the arrogant Senator Jackson Crenshaw and Dr. Karen Fast from the president office expecting to keep the budget of her laboratory. Colonel Sam Synn is responsible for the security with Lieutenant Rivers and Pvt. Jordan Reid. Dr. O'Hara explains that her machine is the fruit of a long research initiated by her father and can show parallel dimensions. During the demonstration, there is a problem in the device and the room is transported to another dimension with everybody that is observing the experiment. Soon the survivors discover that the room is placed in the wilderness of a dangerous dimension inhabited with wild beasts.