Nai searches for someone important to him, with only an abandoned bracelet as a clue. Gareki steals and pick-pockets to get by from day to day. The two meet in a strange mansion where they are set-up, and soon become wanted criminals by military security operatives. When Nai and Gareki find themselves desperate in a hopeless predicament, they encounter none other than the country's most powerful defense organization - "Circus"!!

In an effort to secure his new family, an insurance agent undertakes an effective raid on clients, unaware that elsewhere, a scam is being hatched against him, and apparently not just one. The speed with which problems begin to pile up relentlessly rises vertiginously, and the fall becomes uncontrollable.

本作的舞台是一座架空西欧都市，是一部充满了冒险及童话色彩的奇妙空想物语。 主人公无（ナイ)是位失去记忆的少年，不但缺少常识，对自己也知之甚少，只残留下要寻找自己的腕轮之前的主人“嘉禄”的记忆。无在旅途中被叫Mine的女人绑架，后被花砾所救。得知了腕轮与组织“轮”之间的关系，两人踏上了旅途。在一连串的意外发生后，世界的面纱缓缓掉落……