15年前に組織を裏切り、メギドと手を組み、異変を起こしてきたカリバー。その正体は先代炎の剣士・上條大地だった。自分の父が15年前の事件を起こしたと苦悩していた賢人の心は大きく乱れる。心配する飛羽真の声は賢人には届かない。裏切ったのは本当に父なのか。そして、父は今どこにいるのか。賢人は父への思い、そして上條に執着するあまり、冷静になれと諫める倫太郎と対立してしまう。
一方、街では複数の場所が同時に消えていた。飛羽真たちはそれぞれの異変に立ち向かう。しかし、賢人は…。
Kamen Rider Calibur, who betrayed the Sword of Logos 15 years ago and joined with the Megid, has his identity revealed as Daichi Kamijo, the previous Flame Swordsman! Kento's heart, struggling to reconcile his feelings that his father could have actually caused that chaos 15 years ago, feels greatly disturbed! Touma's shouts of concern do not reach Kento's heart, as he wonders "Could my father really have betrayed us?" and "Where is he now?!" Kento confronts Rintaro after he tries to calm him down over his feelings with his father, and his new obsession with Kamijo. Meanwhile, several locations in the city start vanishing all at once, as Touma and the others face these incidents one by one! But Kento...!
