The recently completed Keel Nuclear Power Plant has been taken over, and S-SWAT are tasked with handling the situation. Except as Laila (now promoted to Lieutenant) points out in the intro, why send in the Supernatural SWAT squad to deal with common terrorists? As the Chief reveals, they've found strange creatures in sewers - creatures not of this world, but from Hades (the other dimension in the first game), meaning whoever was behind the previous crisis is behind this one. What survivors remain are barricading themselves indoors. The city has been cordoned off and Laila is the prime candidate for the mission. So off she sets, with four fellow S-SWAT members, to regain control.