There has been a series of marriage scam incidents, and a Roidmude seems to be involved. Shinnosuke and Kiriko investigate, while Go goes undercover as a guest at a wedding ceremony.

While Shinnosuke and Go deal with the out-of-control Drive Type Dead Heat, Rinna falls into the clutches of the Voice Roidmude. Disappearing together, Shinnosuke must piece together what happened in Rinna's past.