Mary Maroni (Lea Thompson) is a loving wife, a caring mother-of-three, and Bridgestone's finest cupcake baker. Her simple life becomes a lot more complicated when her daughter secretly nominates her to run for mayor. Before she can react, a unfortunate accident involving the incumbent mayor sends her straight into office. With the love and support of her family to guide her, it is up to Mary to prove that she has the right ingredients to clean up the town. All rise for Mayor Cupcake !