Po secretu vsemu svetu (In Secret to the Whole World) is a 1976 Soviet two-part television film produced by Belarusfilm.
[1] It is adapted from Viktor Dragunsky's popular children's book The Adventures of Dennis, a collection of short stories told from the perspective of a young boy.
Includes three stories: A family friend, Marya Petrovna, promises Denis that she’ll take him to her country house but doesn’t keep her word.
Trying to make it up to the disappointed boy, she ends up repeating the lie, promising him a real Budyonny saber next time.
While resting in the park, an older stranger approaches them, claiming he needs the bike to get medicine from a pharmacy for his sick grandmother.
Eventually, Vanya and Denis agree and wait all evening, only to realize the stranger deceived them and stole the bike.
When they arrive, Uncle Sasha asks Viktor Korablyov, Denis’s father, to take the wheel for an important task.