In 2080, Tokyo, the capital of Japan, became a center for daring scientific experiments, newest research in space ship technology, and organized crime. A new deadly drug was developed, that enhanced sexual experiences of human beings, eventually subduing their will and turning them into slaves of whoever possessed the drug. A special unit of the police force was assigned to investigate the crimes committed under the influence of the drug, and to find the criminals that distributed it. The player controls the young female investigator Amano Murakumo. Will she be able to survive in this hostile and terrifying world?