Ryu Terui and Makura follow Himuro, an inspector who has been leaking info to Gaia Memory dealers. Once they prepare to arrest him, the Gaia Memory dealers surround them and transform into Masquerade Dopants as Ryu transforms into Kamen Rider Accel to execute the Dopants after Makura trips himself and passes out. By the time Accel finds Himuro, he is killed by the Triceratops Dopant who escapes Accel. While checking on Makura, Ryu is saved from a Masquerade Dopant by Detective Aya Kujo, a member of the FPD who has been working for the LAPD.