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Dr. Kieda, a somewhat wacky but intelligent scientist, has finally succeeded in inventing insect-shaped time machines called "Time Bokan". To prove its efficiency and safety, he decides to serve as the very first guinea pig for its maiden voyage. However, by the time his machine returned, he isn't anywhere inside. The only thing that it returned with is a talking parrot, along with a large gemstone called the , which is seemingly the most powerful and valuable jewel in the world.