Amalia Antonovna, eighty-seven years old, was killed in her own apartment. For no apparent reason. She was already ready to die of old age and prepared a will, according to which all her property, which consisted entirely of antiques, went to her only relative. So why kill? It turns out that the temptation for the criminals was an eighteenth-century harpsichord that belonged to Queen Marie Antoinette. Or rather, it was not the musical instrument itself that seduced the thieves - the embodiment of grace and elegance - but what was in its hiding place, accidentally discovered by the restorer Starygin and the pianist Lisa...