A deadly viral outbreak at a secret underground lab beneath an abandoned mansion prompts a corporate military team, S.T.A.R.S., to investigate. As soldiers are picked off by zombies and bio-organic weapons, survivor Chris Redfield—a local Native naturalist—joins officer Jill Valentine to fight their way to the lab's deepest level. There, commander Albert Wesker reveals his true mission: to sell the virus data and destroy all evidence using a dead-man's switch bomb. Betrayed by their leader and hunted by the ultimate weapon, the Tyrant, the remaining survivors must escape, destroy the lab, and expose the corporation responsible.