15年前の真実、そして父の行方を求めて上條に立ち向かった賢人だったが、カリバーの新たな力の前に、絶体絶命のピンチに陥った。その時、体を張って救ったのは倫太郎だった。カリバーの凶刃に倒れた倫太郎は……。
一方、街では６箇所が同時にワンダーワールドに取り込まれ、セイバーと剣斬が２箇所でメギドを倒したが、街が元に戻らず巨大な光の柱が立ち上り、上空に光の輪が現れる。残る４箇所では今なおメギドが人々を苦しめている。
ソフィア不在の中、罠だと知りつつ人々を救うために４つの街に向かう飛羽真たち。しかし、賢人だけはその様子を見て、何かを思い出していた。鍵は15年前。賢人は一人、１５年間の想いに決着をつけるため、ある場所を目指す。
Kento finds himself fallen before Calibur's new power as he confronts Daichi Kamijo about the event 15 years ago and the whereabouts of his father! Just then, it was Rintaro who took the attack for him, as Rintaro fell to the power of Calibur's sword! Meanwhile, six locations in the city are being transported to the Wonder World simultaneously, and as the swordsmen defeat two of the Megiddo there, they notice the effects don't disappear, and pillars of light with a ring at the top suddenly emerge from the ground! The remaining Megid are still inflicting damage on the city! With the absence of Sophia, Touma decides to continue fighting, knowing now that this is some sort of trap. However, it was Kento who recognizes this effect and remembers something important! The key to all of this lies 15 years ago! Kento decides to go to the place where he made his promise, to reconcile his feelings from long ago...
