Sergey Nazarov, who once left this southern seaside city as a disgraced and injured diver, returns after ten years as a police captain. Everything here is familiar to him, and everything seems close. Sashа… the only love of his youth—now has become a real beauty. But Sasha has a serious problem: her mother has disappeared.
Nazarov quickly realizes that the matter is serious, and Alla Gennadievna will no longer come home. This is confirmed by various pieces of evidence: a bag, a wallet, a phone, and glasses that she always brought with her are left at home. But most alarming to the police is that the surveillance cameras in the house were turned off, and all recordings were erased.