Ryo and Kaori run into Mariko, an old friend of Kaori's and an aspiring pickpocket. Out of concern for her friend, Kaori asks Ryo to try to convince her to give up pickpocketing. Ryo then issues a challenge: if Mariko can steal Ryo's Wallet, then Mariko can continue as a pickpocket. Otherwise she must quit the profession. Little do the three of them know that Mariko has been targeted by Yakuza after stealing a piece of jewelry containing secret files from a daughter of a Yakuza boss.