Zhenya, simple and extremely good girl, living in a hostel, and works as a trolley bus driver. The main thing in life for her - to help people. She replaces colleagues at work, free lodges in her former teacher and gives hardly known girl her unique dress. Three friends make fun of her behind her back and are confident that her personal life does not shine. But Zhenya's inexhaustible optimism continues to believe that her trolley bus is traveling on the happy path. And once in her life comes a miracle.

The brownie escapes from the captivity of Baba Yaga in her magical world, and ends up in the apartment of the girl Natasha and her parents. Kuzya needs to find his magic chest that grants wishes. Both Natasha and the local grumpy brownie Nafanya help him in this. It turns out that Kuzya himself gave the chest to Andrey, Natasha's dad, many years ago. It would seem that the goal is already close, but in search of both Kuzya and the chest, Baba Yaga entered our world, and she has her own insidious plans.