Katharina meets Werner at a costume party attended by her friend. Her friend is with her boyfriend (a police informant, unknown to the others) who is dressed like a sheikh. He radios back to the police with information regarding Werner's whereabouts and his meeting with Katharina. The police search Katharina's apartment the next day but do not find him there. They take her in for interrogation which makes her very unhappy. They know he could not have gone far since he was in her apartment last night. They lie to her and use cruel investigation tactics to get her to confess his whereabouts but she will not budge.