KAMEN RIDER: memories of heroez

Sector City, an island brimming with an unknown energy. It was once a well-known tourist area with many visitors every year... until the accident happened. The Narumi Detective Agency received a mysterious email, a request to look for a "Professor Aida". An initial investigation leads Nasae to Sector City, where he encounters a mysterious warrior bearing the letter X.

Who is Professor Aida? And what happened during the accident?

Teaming up with OOO and Zero-One, the Kamen Riders work together in the name of justice to uncover this mystery. The battle for humanity against those who bring harm to it begins now.