When zombies overrun San Francisco, a desperate group survives by locking themselves inside Alcatraz Prison. When the undead breach the island, our heroes are forced to return to the mainland overrun with the undead.

Volcanic activity awakens a prehistoric giant anaconda, forcing the local Sheriff and a band of volunteers to stop the menace.

When a group of friends get stranded on a seemingly deserted island, they soon realize that they're not alone.