When a strange virus quickly spreads through a safari park and turns all the zoo animals undead, those left in the park must stop the creatures before they escape and zombify the whole city.
Horrible watch, probably won't watch again, and can't recommend.
It's actually a pretty great concept, a disease starts in an animal re-animating it, jumping across species as infection sets in.
There are missed opportunities in this, but the two biggest problems are some subpar acting, and horrible CG, which may account for some of the bad acting, depending upon how they shot the live action shots.
When it comes down to it, the animal zombies are like really bad versions of the lickers from "Resident Evil", it's not that there isn't anything worth watching in this, but there just really isn't enough.