Liam loves playing outside at the park and having pajama parties. But what Liam loves more than anything in the world...is chocolate cake! Since he'll be turning five and will be a big boy soon, Liam decides that he'll have the biggest birthday party in the world. He makes flyers and posters and hangs them up around town, inviting everyone he knows-and a few people he doesn't! He decorates his backyard with anything he can find around the house, all to prepare for the best birthday ever. Will Liam end up having the biggest chocolate cake birthday party he's always dreamed of? Or will he end up with the biggest surprise of his life?