Mitya's holidays this year were surprisingly boring. But as soon as he met a group of village kids, they were accused of a series of thefts in a dacha village, and Mitya was almost made a gunner! And the most serious charge is the theft of an expensive motorbike. Well, these guys couldn't be thieves! After all, Alena, a red-haired girl, who looked at her and Mitya’s heart sank, also belonged to their company. Together with his school friends who came to his birthday, Mitya decisively takes on a private investigation - dangerous, but terribly interesting...