Bibles flying through the air, black priest’s robes fluttering behind pillars, horrible screams cutting through the silence; it’s utter chaos at the old church. When the priest comes in to work in the morning, the whole building has been turned upside down. It all started last Christmas and the hauntings have only grown worse since – so much so that this fall, the ghosts are going all-out bananas!

The priest is in despair: Is there no one at Monster Academy who can save her church? Nelly and her teacher Lena-Sleva realize that they will have to put their wise agent heads together if they are to put an end to this extreme case of haunting. The academy’s usual agent methods – calmness, cleverness and cunning – are unlikely to do the job this time. What if they were to act more like tricksters and dare to set a trap for the ghosts? They’ve got nothing to lose…