Underneath The Citadel exists a genetic research facility called The Hive, owned by the Umbrella Corporation. A thief steals the genetically engineered T-virus and contaminates The Hive with it. In response, the facility's artificial intelligence, The Red Queen, seals The Hive and kills everyone inside.

Your commando team does not know why the Red Queen sealed the facility. Your group travels to the underground train under The Citadel that leads to the Hive…