Toys are powers bestowed upon those chosen to wield them, each having qualities that are unique to their users. a number of these individuals are born pure, using their powers to become detectives. Others bloom laced with poison and prefer to become phantom thieves. These two opposing factions caused the formation of varied detective academies round the globe training detectives to fight and catch the phantom thieves.
Sherlock Shellingford, Nero Yuzurizaki, Hercule Burton, and Cordelia Glauca form “Milky Holmes”, a gaggle recognized because the cream of the crop within the Yokohama-based Holmes Detective Academy. However, during a skirmish against the phantom thief Arsene, their Toys suddenly disappear, deeming them unfit to continue as detectives. Stripped of their prestigious life and thrown into a rundown attic, they face expulsion if they fail to regain their powers within subsequent three months.