God asks Joan to ace her history test - on Joan of Arc. In doing so, Joan is accused of cheating (she's usually a C student) and Grace starts a revolution on her behalf. Meanwhile, the family go to a counselor as Will's job is becoming increasingly stressful.

God seems to be playing matchmaker when he encourages Joan to ask a school ruffian to the winter semi formal. Joan's date choice doesn't sit well with her parents, however, especially after Will learns the boy has a juvenile record. Will's also digging up some distressing information about his predecessor as chief of police, who, it turns out, is still cashing a paycheck under another person's name. Meanwhile, Luke looks forward to entering this year's science fair with Grace Polk as his partner.