going straight S1 E3 going sour

Whilst in a cafe Fletch sees a young punk girl try to steal another man's wallet. He steps in to save the situation and, on learning that the girl, Penny, has run away from home, takes her back to his house for a bath and a meal. Unfortunately she steals his daughter Ingrid's purse and Fletch feels let down. However, she comes back to the house with her step-father to apologize and return the purse. Fletch plans to take the family out to celebrate but someone seems to have stolen his money.