Close the door behind the owl

The man left the house - and disappeared. Dissolved in space. The usual story for a big city, where there are no vigilant grandmothers on a bench, and children prefer to look at gadgets, and not on the sides. And what kind of trouble if the old fraudster Mikhail Grois disappeared? Who will cry about him? But, it turns out, there are people to whom he is dear.
Private detectives Makar Ilyushin and Sergey Babkin begin the investigation and quickly go on the trail of the kidnapper. Or is this trace to a dead end? Does the life of a crook worth a precious diadem? The bird flying into the house is a bad sign. And if you yourself lured a frightened sparrow into a trap, but suddenly discovered a predatory and cunning owl instead, you definitely can’t pass the troubles. Will the birds themselves become a victim?