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From now on, screaming babies, sobbing mothers and parents who can't help themselves will breathe easy - Lala Lou, the best nanny in the world, will take care of all their problems. However, only at night and in Lola's imagination. And during the day, Lola is preparing for the role of a big sister.

But where to find a baby to practice on? Fortunately, Lola meets a high school student, Sally, who becomes her role model. Both of them - a teenage girl and a young woman - attend classes in a dance group, and one day Sally offers to help Lola teach a little boy. In addition, only Lola can tell her frankly about her problems with Alex, who lives in Paris and with whom she is in love.

But soon Sally has problems of her own, and what problems! And now Lola has to help her older friend...

And she has to help her older friend.