Ludmila Kolonkova, a friend and colleague of Maria Shvetsova, 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 Andrei. Later, having found Andrei in treason, she never told him that she was pregnant. From sad memories Kolonkova is distracted by her new neighbor in the apartment, Dmitry from Tomsk, who helps her out in all difficult situations. When Vanechka runs away from Lyudmila in the park, it is Dmitry who helps her find him. The boy thought that someone was following him. Kolonkova believes that the son fantasizes, until one day Vanechka does not disappear without a trace. The heroine turns to the local police department. First of all, the operatives begin to search for Andrei. But could he have kidnapped his own son? Constant support Lyudmila is also provided by her friends-colleagues from St. Petersburg - Korablev and Kurochkin.