Длинный день Кольки Павлюкова

A Soviet scientist creates a brilliant robot. This is a boy who is able to solve any mathematical problems, he writes the best essays and sings perfectly! And he is also an exact copy of schoolboy Seryozha Syroezhkin. A clever boy quickly shifts all his duties to an electronic double. He does his homework for him, goes to school and does household chores that his parents entrust to Syroezhkin...

In a small Russian town, there is a Research Institute for magic. One of the witches, Alyona Sanina, is going to marry a guy named Ivan Puhov (not a magician). A jealous Apollon Sataneev tells her boss Kira Shemahandskaya that Sanina is going to marry not Ivan Puhov, but Ivan Kivrin, whom Shemahandskaya is going to marry herself. Enraged, Shemahandskaya, who is a powerful witch, orders Sanina to forget about her Ivan and marry Sataneev instead. And this will be final unless Alyona kisses Puhov before midnight on New Year. Alyona's friends call Puhov to the rescue.

Professor Gromov constructs a robot called Electronic, which looks exactly like Sergey Syroezhkibn, a 6-grader from one of Odessa (USSR) schools. The robot also acts a lot like a human, and its dream is to become a real man. Electronic escapes from the professor's lab and accidentally meets Sergey, his prototype. Meanwhile, a gang lead by Stump is trying to kidnap Electronic to make him steal pictures from museums. For this purpose they send their hitman Urrie.