Aaron the mouse enters the house and runs up the clock. When the clock strikes one, the mouse runs down and befriends Mike, the boy who lives there. They become the best of friends. But Tom, the cat, gets jealous and tries to scare Aaron the mouse away as he feels he was there first. Little does Tom know that Aaron is not scared at all and returns to the house with a big surprise! This is a humorous and entertaining little book with clever rhymes.