Kamen Rider Kabuto Hyper Battle DVD: Kamen Rider Kabuto: Birth! Gatack Hyper Form!!

Twenty years had passed since the battle. The whereabouts of Tendo Soji remains unknown. Humanity and the Worms had been walking a path of coexistence. However, for some reason, ZECT was secretly developing a new Masked Rider system.

The person chosen as the qualified candidate was Yui, the son of Kagami Arata and a high school student. Mishima Masato of ZECT attempted to contact Yui, but standing in his way was Yui's classmate, Tendo Hikaru. Meanwhile, Kagami Arata, having received information from Tadokoro Shuichi, visited his former comrades to confront ZECT's conspiracy, but Kazama Daisuke and Yaguruma So refused to cooperate.

Kagami resolved to fight the enemy alone. But then, the shadow of an unexpected figure appeared before him...!