恵里の命が、あと数日であることを知った蓮は、最後のライダーになって恵里を救うため、なりふりかまわずに戦いに走る。そんな蓮を救うには、ライダーの戦いそのものを止めるしかない。その方法を探す真司の前に、新たなる仮面ライダー・タイガが現われた。
Ren and Shinji continue to fight.
Yui learns that Ren will continue to fight for Eri's sake by any means, even if it means he will be dead before his wish can be granted.
Asakura is arrested a tip-off from Kitaoka.
Daisuke and Reiko try to find a connection between the recent disappearances with the mirrors, and more secrets behind Shiro Kanzaki and the Ejima Lab (now known as Kagawa Lab).
Ren challenges Shiro to fight by force in the Mirror World, but is overpowered by Odin. However, before Odin can destroy Knight's Card Deck, he stabs Odin with his Wing Lancer.
Shinji learns that the occupants of Room 401 at Seimeiin University are planning to seal Mirror World.
Eri finally regains consciousness.
