Joe is heading to his first birthday party, but he is feeling a little nervous. As he walks down the street, his imagination starts to run wild with "what if" questions—what if he doesn't know anyone? What if the food is strange? Through the windows he passes, he sees glimpses of his worries turning into funny or slightly spooky scenes. It is a relatable story for any child who has ever felt a bit of "party jitters" or social anxiety.