[1][2] The film's title is translated into English as Masked Rider Blade The Movie: Missing Ace.

Four years after an alternate ending to the series, in which Blade seals the Joker, the characters have moved on with their lives:[4][5] Kenzaki is a garbage man which in comparison to the chaos he went through was a huge change of pace, Mutsuki has graduated high school, and Kotarō has published a book about the Kamen Riders to great success, but on Amane's upcoming birthday, it was revealed that she has become a delinquent without the emotional support of Hajime.

The Undead have been re-released,[5][6][7] and a new trio of Kamen Riders—Glaive, Larc and Lance—have emerged from BOARD, now led by Tachibana.

In the end, Hajime swaps his life for Amane in the Vanity Card and allows himself to be destroyed by Blade to weaken Jashin 14.

Blade uses his King Form to cut Jashin 14 in half, putting an end to the Undead.