On September 28, 1998, 24 hours prior to the events of Resident Evil 2, former Special Tactics And Rescue Service (S.T.A.R.S.) member Jill Valentine attempts to escape from Raccoon City. Most of the population has been transformed into zombies by an outbreak of the T-virus, the gruesome biological weapon secretly developed by the pharmaceutical company Umbrella Corporation. After fighting through zombies and mutants on her way to the Raccoon City Police Department, Jill runs into fellow team member Brad Vickers, who is later killed by a new enemy. This creature, Nemesis-T Type, is a bio-organic weapon programmed to target the surviving S.T.A.R.S. members, who had knowledge of Umbrella's experiments. After she evades Nemesis, Jill encounters three surviving members of the Umbrella Biohazard Countermeasure Service (U.B.C.S.): Carlos Oliveira, Mikhail Victor, and Nikolai Zinoviev.