Amatsu Gai's machinations to complete the Thousand Driver face a challenge from within ZAIA in the form of an idealistic executive.

During the early events of Kamen Rider Zero-One, Amatsu Gai initiates his plans, manipulating Hiden Intelligence, A.I.M.S. and even metsuboujinrai.net through the use of Yaiba Yua and the HumaGear Naki.