Jams lives with his mum, dad and his best friend and biggest headache, Thimble the monkey. (Don't tell anyone what Thimble did with the superglue...) When Mum organises a house-swap holiday in France, what can possibly go wrong. Then Thimble, Jams and Dad find a speedboat, a drill and a makeshift burglar outfit ... but somehow Thimble always saves the day.