Kamen Rider and Super Sentai have always protected the peace of the earth, but this history is about to be overturned. Kamen Rider Decade becomes the leader of "Daishocker" and launches an attack on the Super Sentai, and Gokai Hong also becomes the emperor of "Da Cannibalism" to fight Kamen Rider. In the mouths of the cadres of the two organizations, the mysterious "Big Machine Plan" is mentioned... In order to find out the ins and outs of this war, Kamen Rider Fourze and Go-Busters take the Den-Liner back to the past...