Find out what happens when Tutter receives a letter in the mailbox. When Tutter gets a letter from his Grandma Flutter saying that she's coming for a visit, he couldn't be happier - until he realises that she is arriving that afternoon. What is he to do? The house is a mess and his grandmother likes things to be clean, clean, clean! With the help of his friends in the Big Blue House, Tutter manages to get everything clean and tidy - only to end up in a dirty mess himself! What will Grandma Flutter think? But as he soon discovers, the best thing about families is that they love one another no matter what.