仮面ライダー剣
Having developed the Rider System, based on the Joker's ability to copy sealed Undead, the organization BOARD (Board Of Archaeological Research Department) equips two young men, who become Kamen Riders: Kazuma Kenzaki and Sakuya Tachibana fight together as Kamen Rider Blade and Kamen Rider Garren to protect humans from Undead and seal them. Also fighting Undead is the mysterious Hajime Aikawa as Kamen Rider Chalice, whose purpose is unknown. In addition, a young man named Mutsuki Kamijo struggles to free himself from the control of the sealed Undead powering his own Undead-made Rider System, fighting as Kamen Rider Leangle.