In his new book of adventures, Tim the tiny horse has to deal with some BIG things. He falls in love for the first time with a lady fly who doesn't appreciate him, so he acquires a pet greenfly (called George) to love instead. He has fun being best man at Fly's wedding, and experiences the joys and horrors of babysitting Fly's new baby. And then he decides to rent out his matchbox stable to a mad ladybird and her chaotic host of ant friends.