Ones day Lena, a princess living in 1905, discovers that her parents intend to withdraw her from the Paris Opera School to bring her back to Russia. She decides to run away with her boyfriend Henri. But when they are about to leave, she finds herself projected in time, and lands in Paris in 2018. Lena must rely on her classic training to keep her secret and pretend to be a student of the School of Dance of the Paris Opera.
Understanding that she has just traveled back in time, Lena is terrified. But she has to stay at the Paris Opera Dance School. Also, Henri's father, Victor, is on his trail and should soon help him if he can find Lena. Unfortunately, Victor is not the only one looking for her. Three dangerous individuals, the Time Collectors, are looking for her, to get the pendant that Henry gave her. Lena will have to use her resources as a classical dancer and learn hip-hop to keep her place at the Opera Dance School and be saved without her secret being discovered.
The arrival of the real Elena Grande raises many questions. Fortunately for Lena, Victor arrives in time to save the day. He hastened to answer all the questions, specifying that Lena is part of the noble line of the royal family of Russia and that a patron will pay her school fees if she's allowed to stay in the school. Impressed by her extraordinary talent, Madame Carré agrees to keep her, which drives Ines crazy. Victor then abandons Lena and attempts to trap the Time Collectors, but Henri has already prepared a plan on his side to save Lena. All of this latter will have unexpected consequences.
Henri's reaction to the pendant certainly saved Lena from the Time Collectors, but they are unfortunately not the only ones to find it again, because Victor and Henri are prisoners in different areas. For her part, Lena must make her mark at the Dance School, and Inès, her new confidante, will help her. And help, Lena needs it! Between the heavy workload, modern dance techniques and relationship problems with Max, she is definitely not in her element.
Seeking to get used to her new world, Lena asks another student like Jeff, to accompany her out of school for the day. Everything is curious, exciting, and Lena is easily distracted by this new world made of colorful outfits, lively music and technology that is unknown to her. But there are lots of rules at school, and being punctual is one of them. Lena is after sent to detention because she was not ponctual. Then, Jeff introduces her to hip-hop during their first rehearsal with the BLOK but in return, Lena must help him with classical ballet. Meanwhile, the other students participate in an exercise, and Inès is annoyed by Dash's interpretation of her.