EXISTENCE- the new Lya is she weaker ?

Elysabeth Oliver, a 17-year-old girl, returns from her boarding school in Paris to return to the cradle of her problems, Arven, the city where she was born ...
With her best friend Alya Bellah, they will try to rebuild themselves despite their traumatic past in this city. Elysabeth will meet new people there and meet a longtime friend, Jayden, Alya's twin brother.
Will she be able to silence her demons to redeem herself from her faults?
Will she come out of her turns which are engraved in the depths of her soul and her existence?
Will the arrival of Kais, a scornful skateboarder be there for something?