Mona Gray is a quirky young woman who hides in a private world of numbers after her beloved mathematician father falls ill. But when Mona is offered a job as an elementary school math teacher, she will introduce the students to her own eccentric gift for numerical obsession. Can the joys of arithmetic multiplied by a shy romance with the school science teacher help Mona discover a new life she can count on?

This drama is based on events in the life of Ron Clark, a passionate and innovative teacher who left his small town to teach in one of Harlem's toughest schools. Clark uses persistence and unconventional methods to reach his students and encourage them to reach their full potential.