Introverted and socially anxious Tortoise discovers that parties with friends aren't as overwhelming as he thinks - instead they can be quite enjoyable. Tortoise is NOT a party animal. He thinks parties are noisy and silly, and he's far too shy. But his friends have invited him to a very special party, and everyone's expecting him there. Perhaps he can make a quick appearance and go home early - but when he turns up, there's nobody there. Perhaps the party isn't happening after all!