On Mars found a mysterious box -- Pandora"s box is opened a huge wall suddenly appeared! The story begins. Known as the "sky" wall of the walls of the Japanese archipelago is divided into three parts and thus the birth of their capital "" "" "East West North". In the "East" has been referred to as the Smash did not confirm the coming to life and secretly put humans into disrepute. The man who stood before Smash was a young man with a belt around his waist and an incredible bottle in his hand. Transfiguration! "- young genius physicist turned into Kamen Rider Build blocking in front of Smash!