Kamen Rider Saber

Touma is visited by a man from the Sword of Logos, Rintaro Shindo, who has come to relieve him of his SworDriver and Brave Dragon Wonder Ride Book. When Touma refuses to give them up, Rintaro takes him to his organization's headquarters to debrief him on the conflict he has become involved in. Touma now faces the choice of whether to use his power as Kamen Rider Saber to save people and the world, or stay out of it.

Touma meets two other members of the Sword of Logos. One is Kento Fukamiya, his childhood friend, and the other is Ryo Ogami, a great swordsman who divides his time between fighting and raising his son, Sora.

Despite Ryo defeating the Hanzaki Megid, the place it attacked did not return to normal and Sora is still missing. In response, Touma and the other members of the Sword of Logos look for a way to rescue him.

Touma and his friends must face Kamen Rider Calibur, a former member of the Sword of Logos who defected to the Megid's side. Meanwhile, Touma realizes that Kento is disturbed by the enemy's appearance and learns the connection between them.

Another member of the Sword of Logos, Ren Akamichi, visits Touma's bookstore seeking Kento's recognition. When he learns of Kento and Touma's friendship however, the young ninja develops a rivalry with the latter. Meanwhile, Megid commanders Storius, Legeiel, and Zooous make their move against the Sword of Logos.

Touma and Kento depart to look for the mythical land of Avalon so the former can unseal his sword, but Calibur stands in their way, intending to claim the secret power located there for himself.

After claiming the King of Arthur Wonder Ride Book and unsealing his sword, Touma begins to doubt if he can master the former's power. After Ryo is turned into stone while protecting him however, he comes up with an idea to rescue him with help from his friends.

After his recent feats, Touma is recognized by the others as a full-fledged member of the Sword of Logos, but when the Megids prepare multiple Alter Books for their next plan, Tetsuo Daishinji, the order's mechanic, joins the fray as Kamen Rider Slash after repairing his own weapon.

Calibur steals some Wonder Ride Books from the Sword of Logos to complete his plan. While fighting to get them back, Touma and his companions discover his true identity.

Touma and the others are shocked to discover that Calibur is Daichi Kamijo, the previous Kamen Rider Saber while Kento is in distress over not knowing his father's whereabouts. Meanwhile, the Megids strike again and Daichi appears with a new power that makes him a bigger threat.