As the city is locked down under quarantine, Alice finds out that the people that died from the previous incident at the Umbrella Corporation have turned into zombies. She then joins a small band of elite soldiers, who are enlisted to rescue the missing daughter of the creator of the mutating T-virus. Once lack of luck and resources happen, they begin to wage an exhilarating battle to survive and escape before the Umbrella Corporation erases its experiment from the face of the earth.

A team of space marines known as the Rapid Response Tactical Squad, led by Sarge, is sent to a science facility on Mars after somebody reports a security breach. There, they learn that the alert came after a test subject, a mass murderer purposefully injected with alien DNA, broke free and began killing people. Dr. Grimm, who is related to team member Reaper, informs them all that the chromosome can mutate humans into monsters -- and is highly infectious.

An old gangster is advised that Freddie Mays would leave jail after thirty years in prison. His mood changes and he recalls when he was a young punk and who joined Freddie's gang—a man he both envied and ultimately betrayed.