Twelve-year-old Antonia MacPherson, better known as Ant, is having a tough time. She's the middle child, right in between older sister "Your Highness Elizabeth" and younger sibling "Katherine the Great." At this point, Ant's dog Pistachio and her best friend Harrison are the only beings that matter to her. And it certainly helps that Ant is a quick thinker and a great liar --- skills that get her through and create some good laughs. But one of Ant's teachers suspects there's some hidden truth behind the lies. Will she discover it?