In a children's camp in Siberia, friends from childhood and classmates Tanya Sabaneeva and Filka were resting and now they are returning home. The girl is met at home by the old dog Tiger and the old nanny (her mother is at work, and her father has not lived with them since Tanya was 8 months old). The girl dreams of a wild Australian dog Dingo, later the children will call her so for being isolated from the collective.

Filka shares her happiness with Tanya - the hunter father gave him huskies. Paternity theme: Filka is proud of her father, Tanya tells a friend that her father lives on Maroseyka - the boy reveals a map and searches for an island with that name for a long time, but doesn’t find it and tells Tanya who is crying and runs away. Tanya hates her father and reacts aggressively to these conversations with Filka.

One day, Tanya found a letter under her mother’s pillow in which her father informs about the move of his new family (wife Nadezhda Petrovna and her nephew Kolya - the adopted son of Tanya’s father) to their city. The girl is overwhelmed with a feeling of jealousy and hatred for those who stole her father. Mother is trying to set Tanya positive in relation to her father.

That morning, when the father was supposed to arrive, the girl plucked flowers and went to the port to meet him, but not finding him among those who came, she was giving flowers to the sick boy on a stretcher (she still does not know what Kolya is).

Studying begins, Tanya tries to forget about everything, but she does not succeed. Filka is trying to cheer her up (the word a comrade writes on the board with b and explains this by saying that this is a second-person verb).

Tanya lies with her mother in the garden. She is well. For the first time, she thought not only about herself, but also about her mother. At the gates, the colonel is the father. Hard meeting (after 14 years). Tanya turns to her father for “You.”

Kolya falls into the same class as Tanya and sits down with Filka. Kolya was in a new, unfamiliar world for him. He is very hard.

Tanya and Kolya are constantly quarreling, and on Tanya’s initiative, there is a struggle for the attention of her father. Kolya is an intelligent, loving son, he treats Tanya with irony and mockery.

Kolya talks about a meeting with Gorky in the Crimea. Tanya basically does not listen, this translates into conflict.

Zhenya (a classmate) decides that Tanya is in love with Kolya. Filka takes revenge on this for Zhenya and instead of Velcro (resin) treats her with a mouse. The little mouse lies alone in the snow - Tanya warms it.

A writer arrived in the city. Children decide who will give him flowers Tanya or Zhenya. They chose Tanya, she is proud of such an honor (“shake the hand of the famous writer”). Tanya opened the inkwell and doused her hand, Kolya noticed her. This scene demonstrates that relations between enemies have become warmer. Some time later, Kolya invited Tanya to dance with her on the Christmas tree.

New Year. Cooking. "Will he come?" Guests, and Kolya not. “But recently, how many bitter and sweet feelings were crowding in her heart at the mere thought of her father: What is the matter with her? She thinks about Kolya all the time. ” Filka is hard going through Tanya’s love, as he is in love with Tanya. Kolya gave her an aquarium with a goldfish, and Tanya asked her to fry it.

Dancing. Intrigue: Filka informs Tanya that Kolya will go to the rink tomorrow with Zhenya, and Kolya will say that they will go to school with Tanya tomorrow. The film is jealous, but tries to hide it. Tanya goes to the rink, but hides her skates, as she meets Kolya and Zhenya. Tanya decides to forget Kolya and goes to school for a performance. The snowstorm begins abruptly. Tanya runs to the rink to warn the guys. Zhenya got scared and quickly went home. Kolya fell on his leg and cannot walk. Tanya runs to Filka’s home, gets into the dog team. She is fearless and decisive. Dogs suddenly stopped listening to her, then the girl threw them at the mercy of her beloved Tiger (it was a very big sacrifice). Kolya and Tanya fell from the sled, but despite the fear they continue to fight for life. Buran strengthens. Tanya, risking her life, pulls Kolya on the sled. Filka warned the border guards and they went out in search of children, among them was their father.

Holidays. Tanya and Filka visit Kolya, who froze his cheeks and ears.

School. Rumors that Tanya wanted to destroy Kolya by dragging him to the ice rink. All against Tanya, except Filka. The question is being raised about the exclusion of Tanya from the pioneers. The girl hides and cries in a pioneer room, then falls asleep. They found her. Everyone will learn the truth from Kolya.

Tanya, waking up, returns home. They talk with their mother about trust, about life. Tanya understands that her mother still loves her father, her mother offers to leave.

Meeting with Filka, he learns that Tanya is going to meet with Kolya at dawn. A film of jealousy tells this to their father.

Forest. Kolya's declaration of love. Father comes. Tanya is leaving. Farewell to Filka. Leaves. The end.