Magical Sisters. Party at the Invisible Castle

The best nannies from the "Magical Sisters" club urgently need a new order. And it appears as if by magic!
Friends head to the castle to organize a party for the children of important wizards. It sounds like the perfect task: games, fun, little ones, and a bit of magic. But everything quickly becomes much more complicated.
While the "sisters" explore the dark corridors and play hide and seek with ghosts along with the children, Samantha feels more and more like an invisible person. This is all because her perfect twin sister has arrived at the castle, and next to her, Samantha feels like no one notices her.
But that's not all! One of the little rascals is clearly up to something… How will these magical weekends at the invisible castle end?