Anica, an employee of a teleoperator's call center, receives a disturbing call one evening from Sonja, a wealthy widow whose phone is being followed and tapped. As the threat to Sonja intensifies, Anica is drawn into a case connected to events from her past.

Anica ends up in the police for breaking into Sonja's house, but her former boss, Branko, takes her out of the station. Sonja is not answering anyone's phone and there are increasing suspicions that she has disappeared. Una decides to solve Anica's problem in her own way...

Anica tries to find the location of Sonja's phone. Tijana cannot sit idly by and run away from her uncle's house. Una and Saya plan to wait for Zabac, while Zvezdana finds a way to remove suspicion from Sinpex.

Anica realizes that it is best to hand Tijana over to the police and asks for guarantees for her safety. Contradictory information is coming from the Clinical Center regarding the poisoning of the boy. Branko tries to make a deal with everyone, but increasingly loses control over the situation...

Anica and Tijana discover with who Sonja has been corresponding with, but Anica receives shocking news that distracts her from Sonja's case. Saya tries to reach Una, while Bjelica has a meeting with a powerful man who wants to influence the investigation.