Twelve-year-old painter Esther can't wait to attend Camp Vermeer, the most prestigious art camp around. But when her stepdad accidentally drives up the wrong mountain, she lands at Camp Archimedes -- a math camp! Determined to prove herself to the other campers, she tackles a brain-teaser that's supposed to be impossible, and solves it in a single day. But not everyone is happy about it... someone wants her out of camp at any cost, and starts leaving...