Nai—a young man who travels in search of another by the name of Karoku, a lone bracelet his only lead. Gareki—a willful young man who earns his daily bread by thieving and picking pockets. Thrown together at an eerie mansion, where they are entrapped and framed, Nai and Gareki are soon hunted down as criminals by national security forces. As they are driven into a corner, before them appears the most powerful defense agency in the country, "Circus"—!!