Moscow. Denis Viktorovich, his six-year-old grandson Denis, is brought to the old resident of the house on Karetny. Grandfather Denis tells stories to his grandson every day about his age, who lived in a completely different era. Denis's grandfather's stories become a portal to his carefree Soviet childhood in one of the Moscow courtyards. Stories come to life, and grandson Denis embarks on a journey into the past. It turns out that at any time, children have a lot in common — curiosity, spontaneity, immense love and interest in how this world works.

Oleg works as a realtor in a large modern city. He lives in the same apartment with his wife Lena and son Egor, and likes to spend his free time in the company of his mistress Lyali, who regularly supplies him with banned substances. One day Lena leaves town and leaves her son to Oleg. The father makes another drug order and goes to the specified point with his son. Instead of his bookmark, Oleg takes a kilogram of cocaine and, faced with the real owner of the goods, hides from pursuit by car.

In 2012, the security forces won a large-scale war against drug trafficking. The largest shipments were intercepted and supply corridors from Afghanistan and Europe were paralyzed. But in just one year, a new one was created on the ruins of the largest underground market in Europe. And now modern technology and young geniuses have come here, turning the drug trade into a high-tech industrial industry.

In 2017, the quiet city of Serpukhov near Moscow finds itself in the center of public attention due to the bloody massacre of Dmitry Grachev over his young wife Margarita, who for many years to come will be remembered as "the girl whose husband cut off her hands with an axe."