Dan, a struggling farmer, rents his land to a scientist researching genetic modifications in cattle to boost fertility. When a calf is born, it bites the farmer and a veterinarian, who senses something went awry with the experiment. As night falls, the cow gives birth to another calf, which attacks Dan and eventually escapes, infecting a cow and a young couple who were helping with the delivery. The veterinarian discovers the anomalies and sacrifices the calves, but one hybrid survives and wreaks havoc on the farm, threatening human infection.

Isolation
In a remote Irish countryside, a group of strangers finds themselves inexplicably entwined in a dark and sinister experiment that quickly descends into chaos.