In the old center of Vyborg, an ancient mansion has been preserved to this day, in which, according to legend, the untold riches of the Masons are hidden. Many treasure hunters tried to find the treasure, but without success. And local residents avoid this house and call it the Ghost House. After all, for a hundred years, under mysterious circumstances, people died there with enviable consistency. Amateur detective Nadezhda Lebedeva has a chance to unravel the mystery kept by the House of Ghosts, and she will not miss it.