A criminal bigwig is murdered in a restaurant. With the second shot fired amid the ensuing chaos, a sniper kills an accidental passerby—the lawyer Galina Rodionova. The second killing looks like an accident. But the colonel of the Ministry of Internal Affairs Gurov is convinced that the killer’s real target was the woman. Checks on possible enemies of Rodionova gave nothing. No potential foes were found among her acquaintances either. Gurov dismisses one theory after another until he discovers one oddity linking the murdered woman to her own sister…