Julie keeps getting the wrong answer to what looks like a simple problem: -5+3(6). Frustrated, she gives up, rests her head on her book ... and is awakened by an Imaginary Number who suddenly appears in her room. When she follows the Number through a mysterious portal, she enters a strange land where she meets a zebra-who's really a gebra-named Al. Join Julie on her adventures in the Land of Mathematics, where the Orders of Operations are real places and fruits that look like Bohr models grow on chemistrees. With Al and his friends-scientific ''horses'' representing elements and their isotopes-Julie travels to the Mathematician's Castle for help finding her way back home. Their journey is full of surprises that make math and science interesting and fun.