In the Jyamato Grand Prix, during the Lighting Jyamato Festival, the Jyamato's goal is to build a lightning generator with enough power to completely level an entire town.

While Ace is able to survive the onslaught of attacks led by Michinaga, the same cannot be said for Keiwa and Neon who are injured in the process, thus forcing Ace to fight alone.

With the lightning generator now completed, Ace makes his stand as Geats against Michinaga and Toru. However he is seemingly overwhelmed by the combined might of both Kamen Rider Buffa and the Knight Jyamato.