On September 28, 1998, 24 hours prior to the events of Resident Evil 2, most of Raccoon City's citizens have turned into zombies as the result of an outbreak of the Tvirus, a mutagenic virus secretly developed by the pharmaceutical company Umbrella. Jill Valentine, former member of the Raccoon Police Department's Special Tactics And Rescue Service (S.T.A.R.S.), is attacked in her apartment by an intelligent bioweapon known as the Nemesis TType, specifically programmed by Umbrella to eliminate all surviving S.T.A.R.S. members.