Well I will start with a brief review of who is Baba Yaga
Baba Yaga is old, bony and wrinkled, with a blue nose and steel teeth, she has a normal leg and a bone leg, which is why she is often nicknamed "Baba Yaga Paw of Bone". These two legs represent the world of the living and the world of the dead through which she wanders. Baba Yaga is a wicked and cruel being, but not totally evil; people come, usually children. Her teeth allow her to break bones and tear flesh with ease. Despite the fact that she consumes large amounts of meat daily, she always has that lean and bony look. Baba Yaga flies on a mortar (sometimes a pot) and paddles through the air with a silver broom. Baba Yaga does not allow any "blessed" person to remain within her property as long as she knows that the person has a blessing.
The figure of Baba Yagá probably derives from "the Witch", the third component of the Tripartite Goddess (Virgin, Mother and Witch), symbol of the three ages of women. Baba Yagá is widely used by modern Russian fairy tale authors, and since the 1990s of the 20th century, in "Russian Fantasy".
tells the story of a family that moves to a new apartment on the outskirts of the city, in what appears to be a small community next to a forest in which children disappear and no one seems to remember them.
Baba Yaga is a witch who, according to ancient traditions and Slavic narratives, devours children. She possesses a normal leg and a bone one, which signify her ambivalence with the world of the living and the world of the dead.
They begin to live a terrible nightmare after hiring their little baby's nanny, Varya; and his older brother, Egor.
After this, Egor comes home and discovers that there is no sign of the nanny or his little sister, and even his parents have no memories of having a daughter. Egor and his friends go on a search for his little sister and discover that the nanny was a Slavic devil known as Baba Yaga.
Guarded by security cameras, his apartment will be the scene and Egor the witness of the disturbing behavior of the woman. However, when her little sister disappears from the house without leaving a trace of her existence, her parents forget her as if by cruel magic and Egor will notice that the rest of the children are in danger of suffering the same. lucky that Varya.
To find his sister, Egor must enter the dark forest where Baba Yaga's cabin is located, a kind of lair that serves as a bridge between the world of the living and the dead.
The movie is very good, I hope you liked this brief review