In the near future, the brilliant Dr. Komyoji is enlisted to lead the ARK Project—a scientific endeavor dedicated to forging a brighter tomorrow through robotics. However, the doctor’s mysterious death puts those plans to an abrupt hold... Not long after, the grieving Komyoji children wander into the crosshairs of a black ops squad on the hunt for their father’s research. But from within the cross fire emerges Jiro—a bleeding-edge android programmed to protect the siblings! Now on the run, the Komyojis soon discover their father’s once hopeful ambitions have taken a DARK turn...

A young Kamen Rider fan is granted his wish of seeing Riders in person, initiating the ultimate Japanese superhero crossover meta film. The third and final installment of the Heisei Generations series finds Kamen Rider Zi-O and Kamen Rider Build joining forces with all of the other Heisei Generation Riders to reverse the damages of an evil Time Jacker named Tid, and save their legacy. Are Kamen Riders real? Will you believe?