Los Angeles County park ranger Jack Carter is about to discover that not all is as it seems in his tranquil life. Once responsible for patrolling the many public parks, in particular the popular Griffith Park with its famous observatory and zoo, Jack is about to discover that a whole new kind of animal roams his woods.

The undead kind.

It begins when his brother, on leave from the military, arrives sick. Deathly sick. Jack's concern turns to alarm when his own flesh and blood turns on him, forcing the park ranger to take drastic measures.

Now searching for answers and help for his brother, Jack finds himself on the run from a lethal group of government agents - and from something monstrous that stalks his woods. Something not of this world...and hungry for flesh.