A modest schoolteacher Olga Ivanova has long known that her sister Katya is a desperate adventurer. She knew it, but still let herself be drawn into a dubious story. And now—here you go: a corpse on the living-room carpet, a corpse in a country house… But that’s only the beginning—someone desperately needs Olga’s life. But who? And where, in the end, has her ill-fated sister gone? Olga understands that if she learns the truth, she will save her own life. That’s the only way—there is no other.