Callie loves the theater and singing, but she can't sing very well herself. So when her middle school decides to put on "Moon over Mississippi," Callie decides to be the set designer for the stage crew. Callie is going to put on a Broadway-worthy show--if only ticket sales were up, and she knew something about carpentry, and if there weren't squabbles among the crew. Maybe, Callie thinks, the two cute twin boys who have just joined the theater can help.