The Story

Centuries ago, a battle royale known as the Battle Fight was commenced to decide what species would rule the Earth. There were 52 undeads that represented 52 different species. The winner of that battle was the Human Undead (also known as Heart Category 2 or 2 of Hearts) and the world has been populated by humans ever since. In the present, human archaeologists discovered the sealed Undead and accidentally set them free. Thus, a new Battle Fight begins.

To counter this situation and seal all Undead again, BOARD created the Rider system which were based on Joker's ability. 2 young men were chosen as Masked Riders: Kazuma Kenzaki and Sakuya Tachibana fought together as Masked Riders Blade and Garren to protect humans from Undead and sealed them until Kenzaki encounters the mysterious Masked Rider Chalice whose purpose remains unknown appeared. Things get worst as a fourth rider, Leangle, emerges. The 4 Masked Riders who come from four paths of life fight against the Undead, as well as their own inner conflicts...