Nastya Vyazemskaya investigates death of security guard of antique store. She suspects that this case may lead her to the lost library of Ivan the Terrible - Liberea.

A security guard of antique store on Nikolskaya Street fell down the stairs and died. A page from an ancient Greek manuscript was found in the hand of the diseased. Investigator Nastya Vyazemskaya suspects that the manuscript could be kept in the lost library of Ivan the Terrible - Liberea. Did the diseased find it? And was his death accidental? Soon the police find out that the security guard had been poisoned. But before the death he managed to sell an ancient manuscript. And it was immediately stolen from a buyer. Nastya must find out who is hunting for the treasures of Liberea - an obsessed fanatic, an alchemist or an indestructible "antique dealers" gang? Whoever they are, these people are ready to kill on the way to their cherished goal again and again .