No one in the city noticed the death of the useless homeless man Valery Paneyev. But the death of the beautiful Marina Morozova resulted in a high-profile case. It looks like it was the work of some terrorists who planted a miniature explosive device in a cell phone. By pressing the button, the woman died and her husband was seriously injured. Then businessman Shilov dies. And soon Morozova’s husband is finished off right in the hospital where he ended up after the explosion... Katya Zorina, a famous journalist and writer, is the first to notice one very important circumstance: all the dead - the homeless Paneyev, Marina Morozova, her husband and Shilov - studied in the same class! .