As a result of mysterious circumstances, seventeen-year-old Olga from 2005 finds herself in 2024 in the body of herself, but already a thirty-six-year-old single mother. Having no experience of adult life, Olga behaves like a frivolous girl from the noughties, and dreams of returning to a carefree youth. But by the will of fate, she is forced to take responsibility for her high school son and play the role of a school principal, which she is completely unprepared for.