One day when Leo's history teacher gives him an assignment on Alejandro Magno, Leo, who hates to read, visits the library to begin his research. Accompanied by his best friends Rita and Abram, Leo searches through the stacks and discovers a strange blue book. To everyone's surprise, the young protagonist of the book requests Leo's help in the search for an ancient grave. The book leads Leo, Rita, and Abram on a series of exciting adventures to distant lands as they attempt to solve the mystery within the book's pages.