Tilly and Rosie are best friends and it is Tilly's birthday. To celebrate they are going to have a midnight feast just the two of them in a cellar. But when Rosie comes to pick Tilly up there is another girl in the car called Margaret, Tilly starts to wonder where Margaret will sleep and if the Midnight Feast will still happen because it was only for the 2 of them.
Why did Margaret have to come ? Will the Midnight Feast still happen ?