Shinnosuke and Kiriko investigate a series of power outages that they believe to be caused by the Roidmudes, but it only brings up questions of Mr. Belt's past when Heart himself becomes involved.
Shinnosuke must figure out why he is being dogged by a reporter and discover who is responsible for demolishing several buildings when he cannot find the source of the Heavy Acceleration.
When the Roidmudes seem to discover a new form of evolution for themselves, Mr. Belt thinks it is time for Kamen Rider Drive to use the new Shift Technic Shift Car.
When it is discovered that Volt is trying to cause a blackout on Christmas Eve to further the Roidmudes' plans, Shinnosuke and Kiriko race to stop them.
Mashin Chaser is revealed to be Kamen Rider Proto-Drive, but Mr. Belt cannot figure out how to get him to return to his original self. Meanwhile, Shinnosuke tries to figure out why Lila is being targeted and/or protected by Roidmude #096.