This time Shinobu is hospitalized, but that doesn't keep her from investigating. In their neighbourhood, counterfeit money is going around. For some reason, the granny, Shinobu is sharing her room in the hospital with, gets her hands on it. Also, one of Shinobu's students finds a bunch of it, but in the end it can be cleared where the money is from. Also, there are a lot of quarrels between Shindo and Shinobu's Omiai partner as both of them like her, but sensei doesn't show any interest.