Julia Martin is the most incredible girl in school, and Mason Howell is hopelessly smitten by her. Julia is in charge of the local Charity Christmas party and she's pleased with how everything is going...until her Santa Claus calls in sick. In a panic, she begs Mason to help her by wearing his grandfather's heirloom Santa Claus suit. Mason agrees, to impress the beautiful girl, but things don't go as planned...as soon as he puts on the suit, he gets all the powers of Santa Claus!
Together with John Patton, Mason's best friend, they learn his grandfather was a member of an ancient league of men and women dedicated to helping St. Nicholas use Christmas magic to save the world. The three of them could become the newest members of the Santa Claus League...if they can learn the secrets of Christmas magic!