Janey has got an A for French and would like a party. Susan says as she trusts Janey she can have one while they are away visiting friends in Oxford, but Ben thinks she’s crazy. Ben and Susan set out for Oxford, but on the way they stop at an off-licence and Ben overhears the salesman talking about a girl whose parents are mad enough to leave her alone to have a party. They decide to sneak home and make sure all is well, and end up having to retreat to their bedroom and hide – they don't want to be discovered by Janey, as she will think they don't trust her.