Mia and her partner Benny, along with Mia's sister, Alicia, will be in charge of solving some puzzling cases that are happening in their city Hamburg. Surrounded by ghosts and mysterious characters this group of friends, accompanied by other young people, follow their clues.

For over 500 years now, the castle ghost Hui Buh has been stirring things up at Castle Burgeck. His friend and owner of the castle, King Julius is not the only one who finds Hui Buh's poor attempts at scary hauntings terribly annoying. The chaotic atmosphere at the castle reaches an all-time high when the young witch Ophelia appears at the castle gates out of nowhere, claiming to be Hui Buh's long lost niece. Ophelia is in possession of the Necronomicon, an ancient book of spells that is as evil as it is powerful. Hui Buh, realizing the possibilities that the book would open up for him, is dying to get his hands on the book...