Sins under the sun, riddles in the night, this is a bizarre cyberpunk world... In the future of Brilliant City in 2276, the urban population explodes, human life span is extended, supplies are in short supply, food is poisonous, and classes are solidified. Childbirth is difficult, and crises are lurking in every corner of the city. In the mysterious 13 departments, Jean walks among the complicated forces, creating order in the city...