Legends recount the tales of Excalibur, a revered sword that bestows immense power upon the worthy, naming them Arthur. Yet, a divine intervention fractures time, birthing numerous Excaliburs. To restore the timeline, a team of six Arthurs—Danchou, Renkin, Kakka, Yamaneko, Tekken, and Rurou—are hurled into the past where these aberrant swords emerged. Their mission: obliterate the countless Excaliburs that threaten the temporal balance, a daunting sum of one million blades.