The series revolves around the main character, Sergei Krymov (the owner of a travel agency), and his common-law wife, Svetlana, who is suddenly visited by her mother, Antonina Mikhailovna, from the village. His mother-in-law quickly finds common ground with Sergei's daughter from his first marriage, Dasha, but the differences in their upbringing and outlook on life become a source of constant clashes with Sergei's sister, Valeria. Gradually, Antonina Mikhailovna learns that her daughter and Sergei are not married, and she tries in every way to facilitate this, sometimes using very unusual methods. Furthermore, at the travel agency "Krymov and Co.", where Sergei and Svetlana work, every day brings new, sometimes intractable, problems. But the resourceful mother-in-law will always find a solution, even if the situation initially seems hopeless.