TV Standard: NTSC
Color: Color

Credits:

Shotaro Ishinomori

Description:

The story begins with the mysterious appearance of Bagster, an enemy of Kamen Rider Ex-Aid, in the world of Kamen Rider Build, which is divided into three parts by a huge wall called Skywall. Why does an enemy that should not exist appear...? SENUNAGI crumples in front of the unidentified enemy, helpless to do anything about it, and a strange figure stands before him, half of his body covered with a mecha. The man, who claimed to be a scientist, activated a huge machine, and suddenly an upside-down world appeared in the sky above. Meanwhile, the same phenomenon occurred in the world of "Ex-Aid. The world with the Skywall is approaching on the ground every second. Only 24 hours remain before the two worlds collide. The countdown to extinction has begun. Only "those" warriors can save mankind from this unprecedented crisis.