Resident Evil Zero (or Resident Evil 0) is a survival horror video game and a prequel to Resident Evil (1996), covering the ordeals experienced in the Arklay Mountains by special police force unit, the S.T.A.R.S. Bravo Team. The story takes place in July 1998 and follows officer Rebecca Chambers as well as convict Billy Coen as they explore an abandoned training facility for employees of the pharmaceutical company Umbrella.