Powerful relics known as the Precious appear throughout the world. Noticing these relics' power, various Negative Syndicates wish to take the Precious for themselves and utilize them for evil ends. To make sure that the Precious do not fall into the hands of the Negative Syndicates, the Search Guard Successor Foundation (SGS) has developed its own special operations team, the Boukengers, whose mission is to collect the Precious and thwart the Negative Syndicates.
