Mariya Shvetsova's friend and colleague Lyudmila Kolonkova gets a long-awaited vacation and comes to Sochi with her six-year-old son Vanechka. The vacation is marred by one circumstance: it was here seven years ago that Lyudmila met Vanechka's father Andrey. Later, having caught Andrey cheating, she never told him that she was pregnant. Kolonkova is distracted from sad memories by her new neighbor in the apartment, Dmitriy from Tomsk, who helps her out of all difficult situations. When Vanechka runs away from Lyudmila in the park, it is Dmitriy who helps find him. The boy thought that someone was following him. Kolonkova believes that her son is fantasizing, until one day Vanechka disappears without a trace. The heroine contacts the local police department. First of all, the operatives begin to look for Andrey. But could he kidnap his own son? Lyudmila also receives constant support from her friends and colleagues from St. Petersburg - Korablyov and Kurochkin.
