In the series "Zemsky Doctor. The Return," the personal and professional adventures of surgeon Olga Samoilova continue. After all the losses, she was finally able to open her heart and remarry. She lives with her chosen one, Petr, her mother Natalya Georgievna, her biological daughter Katya, and her adopted daughter Mila. In addition, the heroine is preparing to become a mother once again. During Petr's business trip, Olga unexpectedly starts feeling unwell. She has to be hospitalized, but an unpleasant surprise awaits her at the hospital.