In Moscow, socialite Marina Levkoeva is found murdered, so detective Lena investigates by attending a party posing as the dead woman.

More intrigues and betrayals come to light as Igor asks Boris Markovich to remove Lena from the investigation and to erase Dasha's testimony.

While Lena's new interest in Gleb creates trouble with both Alex and Max, and more dodgy affairs are revealed, Dasha's husband Borya is arrested.

Max continues with his interrogations; Alex gets involved with a student; Lena creates great turmoil by attending a party with Gleb.

Old lies come to the surface on Lisin's wedding day; Lena's marriage is on the ropes; Borya is driven to the edge by Dasha's behavior.

Max tries to secretly obtain a DNA sample for the investigation; anxious about Lena's affair and his issues at work, Alex takes off with their son.