Set to investigate a series of grim murders in the city of Raccoon, S.T.A.R.S. Bravo team takes immediate action. On the way to the scene of the incident, their helicopter crashes. Although all members of the team survived, a terrible discovery awaits them: a nearby military truck is filled to the brim with corpses and this is only the beginning of the nightmare. Very soon, the Bravo team will find itself in the midst of a growing madness, and Rebecca Chambers becomes more and more perplexed as to how she got involved in all this.