The year is 20XX. Tough but idealistic Koga has just joined the Tokyo branch of SHWD, the Special Hazardous Waste Disposal unit responsible for eradicating mysterious biological weapons that were left behind after the great war. Her mentor is Sawada, a woman with a powerful psyche who complements Koga's physical prowess. Something is sizzling between the two of them, and it's more than just a shared mission. Together, these two badass women must team up to confront horrors beyond their wildest nightmares.