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!