A British Squad is sent on a training mission in the Highlands of Scotland against Special Operations squad. Ignoring the childish "campfire" stories heard about the area, they continue with their mission and come across the bloody remains of the Special Ops Squad, and a fierce howling is pitching the night sky... With two mortally wounded men, they make an escape, running into a zoologist by the name of Megan - who knows exactly what hunts them. What began as what they thought was a training mission turns into a battle for their lives against the most unlikely enemies they would have expected - werewolves.

A lethal virus spreads throughout the British isles,infecting millions and killing hundreds of thousands. To contain the threat, acting authorities brutally quarantine the country as it succumbs to fear and chaos. The quarantine is successful. Three decades later, the Reaper virus violently resurfaces in a major city. An elite group of specialists, including Eden Sinclair, is urgently dispatched into the still-quarantined country to retrieve a cure by any means necessary. Shut off from the rest of the world, the unit must battle through a landscape that has become a waking nightmare.