Anna and Holly have spotted an advert in the paper for a Holy Moly Holiday. They simply CAN'T not go. But how will they get enough money? Simple: they'll become royal babysitters. Unfortunately, the girls are in for a shock. They discover there isn't just one prince, but six! And worse, the country's arch enemy, King Alaspooryorick, has decided to invade. Will the girls be able to keep their royal charges safe and still go on their dream holiday?