A team embarks on a perilous cross-country mission to transport the one man who survived a deadly zombie virus, hoping he holds the key to a vaccine.

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

Zombies come out at night and two families must survive until morning.