Having received a fee for the first successful investigation, Ailia Noir tries to buy a house in the capital, but someone is persistently trying to prevent her from doing this: the owner of the mansion dies under mysterious circumstances the day after signing the sale agreement, several attempts are made on his heiress , and in the end, the life of Ailia herself is under threat. The student of the Academy of Magic decides to unravel the complex tangle of mysterious events and very strange coincidences. And again, her friend and mentor, the werewolf dragon Zenedin, comes to her aid.