A scientist makes a dangerous connection with the Iron Cross Army when he tries to sell his new breakthrough: a botulism bacteria capsule. When he goes too far and charges 100 billion yen for the capsule, the Iron Cross Army decide to paralyze him and take it by force instead. Witnessing the commotion, the scientist's niece contacts the Youth Detective Club to help her uncle and after bumping into Takuya gets Spiderman involved.