More than anything in the world, Ksenia Zolotareva, or Ksyu, as she called herself, valued her difference from others. Her family moves to a new apartment, and the girl goes to a new school. And everyone there, in Ksyu’s opinion, is so identical, ordinary, sleek... But Ksyu doesn’t want to be like everyone else! The new class does not accept her, even declares a boycott. But what does Ksenia Zolotareva care about this? After all, she has a friend - the real one, the only one... This is the Night Motorcyclist, whose face is always covered by the protective glass of his helmet. For their meetings, Motorcyclist and Ksyu came up with a secret signal - if the girl wanted to meet her mysterious friend, she put a pot of begonia on the window. And soon the peace of the quiet street was destroyed by the roar of the engine - the Night Motorcyclist was rushing on a date with his girlfriend!..