You’ll say—fiction! However, everything happened for real in an old mansion in Chistye Prudy that, for some time now, had not been listed in any documents. On a March Saturday morning, the corpse of the neighbor fell onto Lipа and Lusinda—friends living in the ghost-house. And fine, if it had been only that! The poor man was wrapped all over with wires. One might think he would explode! A new neighbor, Pavel Dobrovolsky, prevented a mass death among the residents gathered at the scene by neutralizing the blast wave. The period of “extremes” continued, gaining momentum. The number of victims grew geometrically. The Paramonovs couple was already on their way to the next world, and Aunt Verочка nearly suffocated from the gas. The turn of the others was next. Pavel suspects all the inhabitants of the phantom house—except, of course, Olympiada, with whom he not only conducts an investigation, but also lights up a romance...