Three friends in a summer camp are looking for a treasure hidden in a old mansion.

A Red Army officer Polevoy possesses a navy dirk with a secret message encrypted in its handle. The second part of a message belongs to a White army officer Nikitskiy. It's up to three young friends of Polevoy to uncover the mystery.

The film is about goodness and the strength of the human spirit. "I will discover the homeland of the bird, and people will believe that there is goodness..." wrote the Russian geographer Shavanosov, a dreamer and romantic who paid with his life for discovering the nesting place of the pink gull in the Kolyma region. The protagonist of the film, Alexander Ivakin, dreams of becoming a traveler, finding traces of Shavanosov, continuing his work, and seeing the pink gull.