Moira's afraid her parents might get upset if they find out she invited the whole school to her birthday party . . . so she just doesn't tell them. The big day arrives, and grades 1, 2, 3, 4, 5, 6, annnnd kindergarten all come knocking down her door. Before long, the house is a total disaster and Moira's parents are going crazy trying to figure out how to get enough pizzas and birthday cake to feed everyone. Just leave it to Moira--she'll figure it all out, and even get the house cleaned up in the process!