A mystery set up 10 years ago, connects to the "Genesis" of Ghost and Drive.

Shortly after Shinnosuke Tomari (Ryoma Takeuchi), Kamen Rider Drive, eradicates the Earth of the 108 Roidmudes, he is put on a special assignment to investigate paranormal activity elsewhere in the city. He heads to the temple Daitenkū-ji to speak with witnesses Akari Tsukimura (Hikaru Ohsawa) and Onari (Takayuki Yanagi), but as he is interrogating them, a Gamma appears and steals an Eyecon from the temple, prompting Takeru Tenkūji (Shun Nishime), Kamen Rider Ghost, to fight it, even though to Shinnosuke it seems that Kamen Rider Ghost is fighting no one at all as he cannot see the Gamma