While fishing, Jin finds a bag full of gold at the bottom of a lake.  They head into town and Fuu eats until she's huge.  Jin and Mugen leave her behind for the red light district.  The owners of the brothel they visit see that there is something strange about the gold they paid with - it is their own counterfeit currency.  Jin winds up with an undercover agent who has been trying for a year to nab the counterfeiters.  She uses him to help her in her duties.