The stage where Kamen Rider is active is in a new city. With huge enterprises as the core, the economy is very prosperous, but there is a sense of closure, so young people dispel the dull atmosphere by dancing hip-hop. Among these young people, there is a game that is secretly popular, which is to summon small animals Invase through lockseed and let them fight each other. These small animals Invase will appear from the opened "door to the other world" during the game, but the door to the "other world" begins to open all over the world, bringing a crisis that threatens mankind. What are the monsters that appear from the other world? What is their purpose? How will Kamen Rider Kamen Rider save the crisis of all mankind? What will be the fate of his opponent Knight? In the chaotic modern society, fighting to implement beliefs is simply the Warring States period of Kamen Rider! Transformed with bright fruit lockseed, the heavy knight battle is about to begin!