Those evil, all powerful corporations just never learn.  Rule #1:  never, never go back into the secret, underground research facility after it has been sealed off because of cannibalistic zombies, rampant viruses, and a crazed, out of control, killer computer.  But in RESIDENT EVIL - APOCALYPSE, the big, bad Umbrella Corporation does just that.  And baaaaad things are released into Raccoon City.  Very bad things.  And it looks like only Alice can stop them.