Welcome to the Purple Bat, the five-star themed hotel in the heart of the mysterious world of humans! A hotel exclusively for witches, whose existence remains highly secret from humans. Until a ten-year-old girl appears and turns the rules upside down. 

Because Clara not only understands witch language, but she is also immune to the tea of forgetfulness that witches usually offer to humans. The human girl Clara and the witch girl Rosalie soon become good friends. Soon, they will need to join forces to prepare the hotel in time for the opening day, while also keeping Rosalie's true identity a secret from the human school. But the most exciting thing is the secret they discover, which explains why Clara understands witch language…