The thirteen-year-old daughter of businessman Kalyazhny was kidnapped for ransom. A private investigation agency took over the investigation. His detective Maksimov soon figures out the potential kidnapper - this is a neighboring schoolboy Maleev. It was not difficult to figure out the address of the dacha where the kidnapped girl was taken. Maksimov goes out of town, but there, instead of an enterprising schoolboy, he is met by very evil and dangerous types. And yet, subsequent events do not unfold at all according to their plan...