Due to the SOMA secret society, Tokyo is under a chaotic order of destruction. People who have a high amount of MTE in them are kidnapped and brainwashed by the SOMA.
A young man falls in love with a woman he meets at a party, but when she leaves him, he must face some uncomfortable truths.
Tetsu Himokura is a parasitologist. He enjoys researching the lives of parasites at his home laboratory and he barely leaves his home. He also has assistant Haruma Takaie to help him. Tetsu Himokura's right hand is a robotic prosthetic hand. He is very smart, but blunt to others.
Hasumi Kayoko, the rookie investigator at the all-female Hasumi Detective Agency, always observes people and cases in a level-headed manner. She detests lies and secrets, and has a strong sense of justice. Her late father worked at the city news desk of a newspaper, but committed suicide 7 years ago. However, the truth lies in darkness and Kayoko's mother, Kyoko, the agency's director, has been secretly pursuing the facts. An incident becomes the catalyst that entwines Kayoko and the people around her, and she closes in on the truth behind her father's death.