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.

During a zombie apocalypse ,a group of survivors hide on Alcatraz Island to escape from rising zombie hordes. When their refuge is overrun, and upon hearing that a scientist may have discovered a cure, they leave the island to seek him out.—G.N.