Terror of the Carnivorous Fauna Plantaingan!!

Archbishop Wing plans to use the poison of the inhuman Plantaingan, combined with 30,000 volts of electricity, to create miniaturized people preserved for use in creating cyborgs. The mutant kidnaps a young boy's sister and Kazami Shiro must fight in order to save her. Plantaingan attacks Rider Scouts HQ to liquidate a captured Destron Soldier and threatens Tachibana Tobei and Company. Can V3 liberate them from the tendrils of death?