Reality Layer Zero

Your grandfather has been accused of murder. You've been summoned by the city of Liere to testify in his defense. You must prove his innocence, or he will be executed. Alas, you are an amateur. Your investigative prowess is nonexistent. All hope is lost... if not for one small thing. Shortly after arriving in the city, you acquired a strange ability that allows you to control others' minds by defeating them in a verbal debate. With this... You might be able to uncover the truth. You have seven days.