The Midnight Market is finally taking place again! But only adult wizards and ghosts are allowed to visit. Bad luck for the students from the nearby school for magic because it is the only place to buy wonderful delicacies and magical pets. You can even find the rare Vanishing Stars there. Ghosts use them to make themselves invisible. `I would love to make myself invisible too!`, says Anna. Amir has an ingenious idea: We could just dress as ghosts to sneak onto the market and mingle with the visitors! The others think it is a great plan. This way, we wont stand out. Maybe we can get hold of these Vanishing Stars? We can pull a lot of pranks with those! The students create teams of four and off they go.